./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/product-lines/elevator_spec1_product17.cil.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 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 00:39:19,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 00:39:19,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 00:39:19,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 00:39:19,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 00:39:19,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 00:39:19,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 00:39:19,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 00:39:19,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 00:39:19,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 00:39:19,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 00:39:19,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 00:39:19,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 00:39:19,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 00:39:19,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 00:39:19,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 00:39:19,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 00:39:19,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 00:39:19,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 00:39:19,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 00:39:19,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 00:39:19,159 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 00:39:19,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 00:39:19,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 00:39:19,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 00:39:19,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 00:39:19,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 00:39:19,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 00:39:19,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 00:39:19,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 00:39:19,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 00:39:19,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 00:39:19,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 00:39:19,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 00:39:19,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 00:39:19,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 00:39:19,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 00:39:19,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 00:39:19,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 00:39:19,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 00:39:19,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 00:39:19,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 00:39:19,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 00:39:19,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 00:39:19,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 00:39:19,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 00:39:19,210 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 00:39:19,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 00:39:19,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 00:39:19,211 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 00:39:19,211 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 00:39:19,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 00:39:19,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 00:39:19,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 00:39:19,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 00:39:19,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 00:39:19,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 00:39:19,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 00:39:19,213 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 00:39:19,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 00:39:19,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 00:39:19,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 00:39:19,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 00:39:19,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 00:39:19,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 00:39:19,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 00:39:19,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:39:19,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 00:39:19,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 00:39:19,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 00:39:19,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 00:39:19,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 00:39:19,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 00:39:19,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 00:39:19,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 00:39:19,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 00:39:19,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09d600be73ca435c113b9c0e8e087d96a910d62ea2126c235d6963c00b3a91c2 [2021-12-16 00:39:19,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 00:39:19,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 00:39:19,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 00:39:19,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 00:39:19,501 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 00:39:19,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-12-16 00:39:19,565 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f7f8a3c/9e86e7455b584fa88fefb1fd7572b4e5/FLAG900db5e24 [2021-12-16 00:39:20,028 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 00:39:20,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/product-lines/elevator_spec1_product17.cil.c [2021-12-16 00:39:20,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f7f8a3c/9e86e7455b584fa88fefb1fd7572b4e5/FLAG900db5e24 [2021-12-16 00:39:20,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75f7f8a3c/9e86e7455b584fa88fefb1fd7572b4e5 [2021-12-16 00:39:20,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 00:39:20,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 00:39:20,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 00:39:20,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 00:39:20,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 00:39:20,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:39:20" (1/1) ... [2021-12-16 00:39:20,344 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45cbfa94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:20, skipping insertion in model container [2021-12-16 00:39:20,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 12:39:20" (1/1) ... [2021-12-16 00:39:20,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 00:39:20,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 00:39:20,698 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/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-12-16 00:39:20,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:39:20,893 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 00:39:20,953 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/product-lines/elevator_spec1_product17.cil.c[27470,27483] [2021-12-16 00:39:20,999 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 00:39:21,019 INFO L208 MainTranslator]: Completed translation [2021-12-16 00:39:21,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21 WrapperNode [2021-12-16 00:39:21,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 00:39:21,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 00:39:21,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 00:39:21,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 00:39:21,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,099 INFO L137 Inliner]: procedures = 90, calls = 333, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 791 [2021-12-16 00:39:21,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 00:39:21,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 00:39:21,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 00:39:21,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 00:39:21,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 00:39:21,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 00:39:21,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 00:39:21,200 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 00:39:21,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (1/1) ... [2021-12-16 00:39:21,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 00:39:21,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:21,240 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) [2021-12-16 00:39:21,265 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 [2021-12-16 00:39:21,281 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-12-16 00:39:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-12-16 00:39:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 00:39:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-12-16 00:39:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-12-16 00:39:21,282 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-12-16 00:39:21,282 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-12-16 00:39:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-12-16 00:39:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-12-16 00:39:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-12-16 00:39:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-12-16 00:39:21,283 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-12-16 00:39:21,283 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-12-16 00:39:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-12-16 00:39:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-12-16 00:39:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-12-16 00:39:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-12-16 00:39:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-12-16 00:39:21,284 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-12-16 00:39:21,284 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-12-16 00:39:21,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-12-16 00:39:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-12-16 00:39:21,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-12-16 00:39:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-12-16 00:39:21,285 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-12-16 00:39:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-12-16 00:39:21,285 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-12-16 00:39:21,285 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-12-16 00:39:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-12-16 00:39:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-12-16 00:39:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-12-16 00:39:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-12-16 00:39:21,286 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-12-16 00:39:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-12-16 00:39:21,287 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-12-16 00:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-12-16 00:39:21,287 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-12-16 00:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 00:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-12-16 00:39:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-12-16 00:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-12-16 00:39:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-12-16 00:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-12-16 00:39:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-12-16 00:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 00:39:21,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 00:39:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-12-16 00:39:21,289 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-12-16 00:39:21,527 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 00:39:21,529 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 00:39:22,323 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 00:39:22,338 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 00:39:22,339 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 00:39:22,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:39:22 BoogieIcfgContainer [2021-12-16 00:39:22,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 00:39:22,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 00:39:22,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 00:39:22,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 00:39:22,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 12:39:20" (1/3) ... [2021-12-16 00:39:22,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f270494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:39:22, skipping insertion in model container [2021-12-16 00:39:22,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 12:39:21" (2/3) ... [2021-12-16 00:39:22,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f270494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 12:39:22, skipping insertion in model container [2021-12-16 00:39:22,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 12:39:22" (3/3) ... [2021-12-16 00:39:22,350 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product17.cil.c [2021-12-16 00:39:22,355 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 00:39:22,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 00:39:22,407 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 00:39:22,412 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 [2021-12-16 00:39:22,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 00:39:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2021-12-16 00:39:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 00:39:22,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:22,466 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-12-16 00:39:22,467 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1594208609, now seen corresponding path program 1 times [2021-12-16 00:39:22,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:22,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879569744] [2021-12-16 00:39:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:22,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:22,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:22,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:39:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:23,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879569744] [2021-12-16 00:39:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879569744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800373818] [2021-12-16 00:39:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:23,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:23,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:23,410 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) [2021-12-16 00:39:23,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 00:39:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-16 00:39:23,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:39:23,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:23,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800373818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:23,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:23,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-16 00:39:23,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228281744] [2021-12-16 00:39:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:23,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 00:39:23,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 00:39:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:39:24,010 INFO L87 Difference]: Start difference. First operand has 539 states, 424 states have (on average 1.705188679245283) internal successors, (723), 445 states have internal predecessors, (723), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) Second operand has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 00:39:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:24,068 INFO L93 Difference]: Finished difference Result 560 states and 935 transitions. [2021-12-16 00:39:24,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 00:39:24,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 97 [2021-12-16 00:39:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:24,090 INFO L225 Difference]: With dead ends: 560 [2021-12-16 00:39:24,090 INFO L226 Difference]: Without dead ends: 531 [2021-12-16 00:39:24,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:39:24,097 INFO L933 BasicCegarLoop]: 896 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:24,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-16 00:39:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-12-16 00:39:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.7033492822966507) internal successors, (712), 437 states have internal predecessors, (712), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 889 transitions. [2021-12-16 00:39:24,179 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 889 transitions. Word has length 97 [2021-12-16 00:39:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:24,181 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 889 transitions. [2021-12-16 00:39:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 31.0) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 00:39:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 889 transitions. [2021-12-16 00:39:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 00:39:24,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:24,201 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:24,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:24,411 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,SelfDestructingSolverStorable0 [2021-12-16 00:39:24,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -365707531, now seen corresponding path program 1 times [2021-12-16 00:39:24,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:24,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161301411] [2021-12-16 00:39:24,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:24,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 00:39:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 00:39:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-16 00:39:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:24,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161301411] [2021-12-16 00:39:24,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161301411] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523839768] [2021-12-16 00:39:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:24,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:24,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:24,880 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) [2021-12-16 00:39:24,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 00:39:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:25,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:25,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523839768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:25,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:25,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:25,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726723832] [2021-12-16 00:39:25,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:25,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:25,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:25,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:25,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:25,405 INFO L87 Difference]: Start difference. First operand 531 states and 889 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:25,516 INFO L93 Difference]: Finished difference Result 1053 states and 1770 transitions. [2021-12-16 00:39:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:25,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2021-12-16 00:39:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:25,526 INFO L225 Difference]: With dead ends: 1053 [2021-12-16 00:39:25,526 INFO L226 Difference]: Without dead ends: 531 [2021-12-16 00:39:25,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:25,532 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 14 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:25,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2618 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-16 00:39:25,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-12-16 00:39:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.700956937799043) internal successors, (711), 437 states have internal predecessors, (711), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 888 transitions. [2021-12-16 00:39:25,564 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 888 transitions. Word has length 99 [2021-12-16 00:39:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:25,564 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 888 transitions. [2021-12-16 00:39:25,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 888 transitions. [2021-12-16 00:39:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-16 00:39:25,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:25,569 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:25,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:25,791 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,SelfDestructingSolverStorable1 [2021-12-16 00:39:25,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:25,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1062806691, now seen corresponding path program 1 times [2021-12-16 00:39:25,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:25,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977919992] [2021-12-16 00:39:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:25,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-16 00:39:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:25,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:39:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:26,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:26,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977919992] [2021-12-16 00:39:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977919992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69260918] [2021-12-16 00:39:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:26,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:26,227 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) [2021-12-16 00:39:26,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 00:39:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1779 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:26,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:26,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:26,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69260918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:26,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:26,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:26,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213051958] [2021-12-16 00:39:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:26,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:26,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:26,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:26,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:26,689 INFO L87 Difference]: Start difference. First operand 531 states and 888 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:26,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:26,754 INFO L93 Difference]: Finished difference Result 1053 states and 1768 transitions. [2021-12-16 00:39:26,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:26,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2021-12-16 00:39:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:26,759 INFO L225 Difference]: With dead ends: 1053 [2021-12-16 00:39:26,759 INFO L226 Difference]: Without dead ends: 531 [2021-12-16 00:39:26,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:26,763 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 12 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:26,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2618 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-16 00:39:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2021-12-16 00:39:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 418 states have (on average 1.6985645933014355) internal successors, (710), 437 states have internal predecessors, (710), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 887 transitions. [2021-12-16 00:39:26,787 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 887 transitions. Word has length 101 [2021-12-16 00:39:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:26,787 INFO L470 AbstractCegarLoop]: Abstraction has 531 states and 887 transitions. [2021-12-16 00:39:26,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:26,788 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 887 transitions. [2021-12-16 00:39:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 00:39:26,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:26,791 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:26,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-16 00:39:27,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:27,010 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:27,011 INFO L85 PathProgramCache]: Analyzing trace with hash -706454475, now seen corresponding path program 1 times [2021-12-16 00:39:27,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:27,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002926584] [2021-12-16 00:39:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:27,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 00:39:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 00:39:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:27,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:27,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002926584] [2021-12-16 00:39:27,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002926584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:27,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562977141] [2021-12-16 00:39:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:27,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:27,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:27,379 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) [2021-12-16 00:39:27,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 00:39:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:27,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:27,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:27,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562977141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:27,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:27,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:27,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832536041] [2021-12-16 00:39:27,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:27,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:27,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:27,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:27,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:27,837 INFO L87 Difference]: Start difference. First operand 531 states and 887 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:27,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:27,915 INFO L93 Difference]: Finished difference Result 1060 states and 1775 transitions. [2021-12-16 00:39:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:27,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 103 [2021-12-16 00:39:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:27,921 INFO L225 Difference]: With dead ends: 1060 [2021-12-16 00:39:27,923 INFO L226 Difference]: Without dead ends: 540 [2021-12-16 00:39:27,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:27,928 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 20 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:27,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2618 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-16 00:39:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-16 00:39:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.6948356807511737) internal successors, (722), 445 states have internal predecessors, (722), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 899 transitions. [2021-12-16 00:39:27,957 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 899 transitions. Word has length 103 [2021-12-16 00:39:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:27,962 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 899 transitions. [2021-12-16 00:39:27,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 899 transitions. [2021-12-16 00:39:27,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-16 00:39:27,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:27,967 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:27,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:28,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:28,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash -480058764, now seen corresponding path program 1 times [2021-12-16 00:39:28,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:28,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129218428] [2021-12-16 00:39:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:28,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 00:39:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-16 00:39:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 00:39:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:28,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129218428] [2021-12-16 00:39:28,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129218428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:28,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113427947] [2021-12-16 00:39:28,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:28,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:28,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:28,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:28,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 00:39:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:28,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:28,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:29,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:29,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:29,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113427947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:29,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:29,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:29,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157017336] [2021-12-16 00:39:29,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:29,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:29,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:29,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:29,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:29,046 INFO L87 Difference]: Start difference. First operand 540 states and 899 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:29,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:29,102 INFO L93 Difference]: Finished difference Result 1062 states and 1776 transitions. [2021-12-16 00:39:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:29,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-16 00:39:29,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:29,107 INFO L225 Difference]: With dead ends: 1062 [2021-12-16 00:39:29,107 INFO L226 Difference]: Without dead ends: 540 [2021-12-16 00:39:29,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:29,110 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 18 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:29,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 2618 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:29,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-16 00:39:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-16 00:39:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.692488262910798) internal successors, (721), 445 states have internal predecessors, (721), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:29,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 898 transitions. [2021-12-16 00:39:29,154 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 898 transitions. Word has length 104 [2021-12-16 00:39:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:29,155 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 898 transitions. [2021-12-16 00:39:29,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 898 transitions. [2021-12-16 00:39:29,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-16 00:39:29,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:29,158 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:29,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:29,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:29,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:29,372 INFO L85 PathProgramCache]: Analyzing trace with hash 701773849, now seen corresponding path program 1 times [2021-12-16 00:39:29,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:29,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062165700] [2021-12-16 00:39:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:29,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:29,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-16 00:39:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 00:39:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:29,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062165700] [2021-12-16 00:39:29,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062165700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:29,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110271380] [2021-12-16 00:39:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:29,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:29,724 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:29,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 00:39:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:29,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:29,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 00:39:30,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:30,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110271380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:30,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:30,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:30,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86993699] [2021-12-16 00:39:30,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:30,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:30,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:30,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:30,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:30,170 INFO L87 Difference]: Start difference. First operand 540 states and 898 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:30,220 INFO L93 Difference]: Finished difference Result 1062 states and 1775 transitions. [2021-12-16 00:39:30,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) Word has length 105 [2021-12-16 00:39:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:30,225 INFO L225 Difference]: With dead ends: 1062 [2021-12-16 00:39:30,225 INFO L226 Difference]: Without dead ends: 540 [2021-12-16 00:39:30,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:30,228 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 17 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:30,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2618 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-12-16 00:39:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2021-12-16 00:39:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 426 states have (on average 1.6901408450704225) internal successors, (720), 445 states have internal predecessors, (720), 91 states have call successors, (91), 23 states have call predecessors, (91), 22 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2021-12-16 00:39:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 897 transitions. [2021-12-16 00:39:30,246 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 897 transitions. Word has length 105 [2021-12-16 00:39:30,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:30,246 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 897 transitions. [2021-12-16 00:39:30,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 1 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 897 transitions. [2021-12-16 00:39:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 00:39:30,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:30,249 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:30,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:30,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:30,464 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:30,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1437379352, now seen corresponding path program 1 times [2021-12-16 00:39:30,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:30,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536728940] [2021-12-16 00:39:30,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:30,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 00:39:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:30,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 00:39:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:30,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536728940] [2021-12-16 00:39:30,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536728940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625233475] [2021-12-16 00:39:30,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:30,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:30,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:30,890 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:30,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 00:39:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:39:31,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:31,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:31,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625233475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:31,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:31,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 17 [2021-12-16 00:39:31,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750800473] [2021-12-16 00:39:31,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:31,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:39:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:39:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:39:31,417 INFO L87 Difference]: Start difference. First operand 540 states and 897 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:31,515 INFO L93 Difference]: Finished difference Result 1081 states and 1805 transitions. [2021-12-16 00:39:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:39:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2021-12-16 00:39:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:31,520 INFO L225 Difference]: With dead ends: 1081 [2021-12-16 00:39:31,520 INFO L226 Difference]: Without dead ends: 563 [2021-12-16 00:39:31,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:39:31,523 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 148 mSDsluCounter, 4272 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5148 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:31,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5148 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-16 00:39:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 559. [2021-12-16 00:39:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.6877828054298643) internal successors, (746), 463 states have internal predecessors, (746), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-16 00:39:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 928 transitions. [2021-12-16 00:39:31,543 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 928 transitions. Word has length 106 [2021-12-16 00:39:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:31,543 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 928 transitions. [2021-12-16 00:39:31,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 928 transitions. [2021-12-16 00:39:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 00:39:31,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:31,546 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:31,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:31,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:31,755 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:31,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1052012569, now seen corresponding path program 1 times [2021-12-16 00:39:31,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:31,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013386423] [2021-12-16 00:39:31,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:31,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 00:39:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-16 00:39:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:32,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:32,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:32,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013386423] [2021-12-16 00:39:32,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013386423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:32,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081062461] [2021-12-16 00:39:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:32,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:32,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:32,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:32,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 00:39:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:32,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:32,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081062461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:32,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:32,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032199442] [2021-12-16 00:39:32,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:32,606 INFO L87 Difference]: Start difference. First operand 559 states and 928 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:32,727 INFO L93 Difference]: Finished difference Result 1122 states and 1879 transitions. [2021-12-16 00:39:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-12-16 00:39:32,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:32,733 INFO L225 Difference]: With dead ends: 1122 [2021-12-16 00:39:32,734 INFO L226 Difference]: Without dead ends: 559 [2021-12-16 00:39:32,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:32,737 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 135 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:32,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2435 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-16 00:39:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-12-16 00:39:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.6764705882352942) internal successors, (741), 463 states have internal predecessors, (741), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-16 00:39:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 923 transitions. [2021-12-16 00:39:32,758 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 923 transitions. Word has length 106 [2021-12-16 00:39:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:32,758 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 923 transitions. [2021-12-16 00:39:32,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 923 transitions. [2021-12-16 00:39:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-16 00:39:32,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:32,762 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:32,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:32,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 00:39:32,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:32,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1192894943, now seen corresponding path program 1 times [2021-12-16 00:39:32,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238984761] [2021-12-16 00:39:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:32,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 00:39:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-16 00:39:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:33,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:33,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238984761] [2021-12-16 00:39:33,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238984761] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:33,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505529812] [2021-12-16 00:39:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:33,340 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:33,341 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:33,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 00:39:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:33,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:33,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:33,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505529812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:33,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:33,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:33,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645713771] [2021-12-16 00:39:33,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:33,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:33,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:33,743 INFO L87 Difference]: Start difference. First operand 559 states and 923 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:33,852 INFO L93 Difference]: Finished difference Result 1122 states and 1869 transitions. [2021-12-16 00:39:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 108 [2021-12-16 00:39:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:33,857 INFO L225 Difference]: With dead ends: 1122 [2021-12-16 00:39:33,857 INFO L226 Difference]: Without dead ends: 559 [2021-12-16 00:39:33,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:33,861 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 129 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 2435 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-12-16 00:39:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-12-16 00:39:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 442 states have (on average 1.665158371040724) internal successors, (736), 463 states have internal predecessors, (736), 92 states have call successors, (92), 23 states have call predecessors, (92), 24 states have return successors, (90), 85 states have call predecessors, (90), 87 states have call successors, (90) [2021-12-16 00:39:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 918 transitions. [2021-12-16 00:39:33,880 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 918 transitions. Word has length 108 [2021-12-16 00:39:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 918 transitions. [2021-12-16 00:39:33,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 918 transitions. [2021-12-16 00:39:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-16 00:39:33,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:33,884 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:33,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:34,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:34,107 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 973349433, now seen corresponding path program 1 times [2021-12-16 00:39:34,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:34,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286109016] [2021-12-16 00:39:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:34,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 00:39:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-16 00:39:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:34,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286109016] [2021-12-16 00:39:34,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286109016] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703911834] [2021-12-16 00:39:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:34,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:34,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:34,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 00:39:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:34,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:34,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:34,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703911834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:34,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:34,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:34,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127872853] [2021-12-16 00:39:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:34,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:34,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:34,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:34,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:34,888 INFO L87 Difference]: Start difference. First operand 559 states and 918 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:35,025 INFO L93 Difference]: Finished difference Result 1158 states and 1917 transitions. [2021-12-16 00:39:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:35,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 110 [2021-12-16 00:39:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:35,029 INFO L225 Difference]: With dead ends: 1158 [2021-12-16 00:39:35,029 INFO L226 Difference]: Without dead ends: 625 [2021-12-16 00:39:35,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:35,033 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 179 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:35,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 2445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-12-16 00:39:35,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 610. [2021-12-16 00:39:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.66869918699187) internal successors, (821), 513 states have internal predecessors, (821), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-16 00:39:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1002 transitions. [2021-12-16 00:39:35,057 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1002 transitions. Word has length 110 [2021-12-16 00:39:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:35,057 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1002 transitions. [2021-12-16 00:39:35,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1002 transitions. [2021-12-16 00:39:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 00:39:35,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:35,060 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:35,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:35,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 00:39:35,275 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:35,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -806284545, now seen corresponding path program 1 times [2021-12-16 00:39:35,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:35,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685423683] [2021-12-16 00:39:35,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:35,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 00:39:35,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685423683] [2021-12-16 00:39:35,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685423683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:35,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017639830] [2021-12-16 00:39:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:35,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:35,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:35,654 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:35,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 00:39:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:39:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:36,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:36,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017639830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:36,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:36,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-12-16 00:39:36,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980905310] [2021-12-16 00:39:36,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:36,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:39:36,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:39:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:39:36,141 INFO L87 Difference]: Start difference. First operand 610 states and 1002 transitions. Second operand has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:36,288 INFO L93 Difference]: Finished difference Result 1150 states and 1897 transitions. [2021-12-16 00:39:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-16 00:39:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:36,293 INFO L225 Difference]: With dead ends: 1150 [2021-12-16 00:39:36,293 INFO L226 Difference]: Without dead ends: 632 [2021-12-16 00:39:36,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:39:36,296 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 177 mSDsluCounter, 5034 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5890 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:36,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5890 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-16 00:39:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 610. [2021-12-16 00:39:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.66869918699187) internal successors, (821), 513 states have internal predecessors, (821), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-16 00:39:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1002 transitions. [2021-12-16 00:39:36,324 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1002 transitions. Word has length 111 [2021-12-16 00:39:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 1002 transitions. [2021-12-16 00:39:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1002 transitions. [2021-12-16 00:39:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 00:39:36,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:36,329 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:36,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:36,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 00:39:36,551 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:36,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash 996001823, now seen corresponding path program 1 times [2021-12-16 00:39:36,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:36,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703190155] [2021-12-16 00:39:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:36,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 00:39:36,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:36,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703190155] [2021-12-16 00:39:36,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703190155] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:36,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371970572] [2021-12-16 00:39:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:36,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:36,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:36,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:36,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 00:39:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 00:39:37,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:37,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371970572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:37,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:37,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:37,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922516334] [2021-12-16 00:39:37,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:37,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:37,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:37,336 INFO L87 Difference]: Start difference. First operand 610 states and 1002 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:37,459 INFO L93 Difference]: Finished difference Result 1158 states and 1915 transitions. [2021-12-16 00:39:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:37,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 111 [2021-12-16 00:39:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:37,463 INFO L225 Difference]: With dead ends: 1158 [2021-12-16 00:39:37,463 INFO L226 Difference]: Without dead ends: 610 [2021-12-16 00:39:37,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:37,467 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 173 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:37,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 2445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-16 00:39:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2021-12-16 00:39:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 492 states have (on average 1.6585365853658536) internal successors, (816), 513 states have internal predecessors, (816), 92 states have call successors, (92), 24 states have call predecessors, (92), 25 states have return successors, (89), 85 states have call predecessors, (89), 87 states have call successors, (89) [2021-12-16 00:39:37,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 997 transitions. [2021-12-16 00:39:37,484 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 997 transitions. Word has length 111 [2021-12-16 00:39:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:37,484 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 997 transitions. [2021-12-16 00:39:37,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 997 transitions. [2021-12-16 00:39:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 00:39:37,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:37,487 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:37,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:37,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 00:39:37,699 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772002, now seen corresponding path program 1 times [2021-12-16 00:39:37,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:37,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815461552] [2021-12-16 00:39:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:37,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-16 00:39:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:38,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815461552] [2021-12-16 00:39:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815461552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67176995] [2021-12-16 00:39:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:38,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:38,015 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:38,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 00:39:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:39:38,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:38,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:38,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67176995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:38,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:38,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:39:38,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229212956] [2021-12-16 00:39:38,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:38,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:39:38,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:39:38,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:39:38,500 INFO L87 Difference]: Start difference. First operand 610 states and 997 transitions. Second operand has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:38,595 INFO L93 Difference]: Finished difference Result 1085 states and 1789 transitions. [2021-12-16 00:39:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:39:38,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2021-12-16 00:39:38,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:38,600 INFO L225 Difference]: With dead ends: 1085 [2021-12-16 00:39:38,600 INFO L226 Difference]: Without dead ends: 634 [2021-12-16 00:39:38,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:39:38,604 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 134 mSDsluCounter, 4239 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5107 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:38,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 5107 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:38,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-12-16 00:39:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 629. [2021-12-16 00:39:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-12-16 00:39:38,625 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 111 [2021-12-16 00:39:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:38,626 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-12-16 00:39:38,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-12-16 00:39:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 00:39:38,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:38,629 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:38,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:38,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-16 00:39:38,851 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -2082574163, now seen corresponding path program 1 times [2021-12-16 00:39:38,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345307912] [2021-12-16 00:39:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:38,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:39:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:39,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:39,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:39,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345307912] [2021-12-16 00:39:39,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345307912] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:39,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118931296] [2021-12-16 00:39:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:39,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:39,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:39,210 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:39,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 00:39:39,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:39,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 00:39:39,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:39,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:39,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118931296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:39,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:39,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-16 00:39:39,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481636760] [2021-12-16 00:39:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:39,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:39:39,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:39:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-16 00:39:39,678 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:39,766 INFO L93 Difference]: Finished difference Result 1115 states and 1840 transitions. [2021-12-16 00:39:39,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:39:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-16 00:39:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:39,770 INFO L225 Difference]: With dead ends: 1115 [2021-12-16 00:39:39,770 INFO L226 Difference]: Without dead ends: 664 [2021-12-16 00:39:39,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:39:39,772 INFO L933 BasicCegarLoop]: 868 mSDtfsCounter, 143 mSDsluCounter, 4229 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 5097 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:39,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 5097 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-16 00:39:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 629. [2021-12-16 00:39:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-12-16 00:39:39,789 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 112 [2021-12-16 00:39:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:39,790 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-12-16 00:39:39,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-12-16 00:39:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 00:39:39,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:39,793 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:39,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:40,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:40,007 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -744370899, now seen corresponding path program 1 times [2021-12-16 00:39:40,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908526153] [2021-12-16 00:39:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:40,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:39:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:40,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:40,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908526153] [2021-12-16 00:39:40,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908526153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684708858] [2021-12-16 00:39:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:40,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:40,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:40,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 00:39:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:39:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:40,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:40,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684708858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:40,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:40,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 00:39:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093745162] [2021-12-16 00:39:40,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:40,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:39:40,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:39:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:39:40,811 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:40,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:40,949 INFO L93 Difference]: Finished difference Result 1100 states and 1814 transitions. [2021-12-16 00:39:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:40,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 112 [2021-12-16 00:39:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:40,953 INFO L225 Difference]: With dead ends: 1100 [2021-12-16 00:39:40,953 INFO L226 Difference]: Without dead ends: 649 [2021-12-16 00:39:40,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:39:40,955 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 177 mSDsluCounter, 5040 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 5898 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:40,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 5898 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-16 00:39:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 629. [2021-12-16 00:39:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6574803149606299) internal successors, (842), 531 states have internal predecessors, (842), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1027 transitions. [2021-12-16 00:39:40,973 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1027 transitions. Word has length 112 [2021-12-16 00:39:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:40,973 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1027 transitions. [2021-12-16 00:39:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1027 transitions. [2021-12-16 00:39:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-16 00:39:40,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:40,977 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:41,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:41,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 00:39:41,191 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash 461750229, now seen corresponding path program 1 times [2021-12-16 00:39:41,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766894718] [2021-12-16 00:39:41,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:41,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 00:39:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 00:39:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 00:39:41,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766894718] [2021-12-16 00:39:41,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766894718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:41,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253925921] [2021-12-16 00:39:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:41,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:41,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:41,516 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:41,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 00:39:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:41,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 1785 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:39:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 00:39:41,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:41,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253925921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:41,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:41,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:41,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962839776] [2021-12-16 00:39:41,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:41,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:41,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:41,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:41,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:41,913 INFO L87 Difference]: Start difference. First operand 629 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:41,971 INFO L93 Difference]: Finished difference Result 1152 states and 1899 transitions. [2021-12-16 00:39:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 112 [2021-12-16 00:39:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:41,974 INFO L225 Difference]: With dead ends: 1152 [2021-12-16 00:39:41,974 INFO L226 Difference]: Without dead ends: 629 [2021-12-16 00:39:41,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:41,977 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 23 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2587 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:41,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2587 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-12-16 00:39:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-12-16 00:39:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6496062992125984) internal successors, (838), 531 states have internal predecessors, (838), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1023 transitions. [2021-12-16 00:39:41,995 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1023 transitions. Word has length 112 [2021-12-16 00:39:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:41,995 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1023 transitions. [2021-12-16 00:39:41,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1023 transitions. [2021-12-16 00:39:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 00:39:41,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:41,998 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:42,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:42,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 00:39:42,211 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:42,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1116279402, now seen corresponding path program 1 times [2021-12-16 00:39:42,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:42,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680541533] [2021-12-16 00:39:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:42,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 00:39:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:42,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:42,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680541533] [2021-12-16 00:39:42,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680541533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:42,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396251009] [2021-12-16 00:39:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:42,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:42,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:42,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 00:39:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 1782 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 00:39:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:42,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:42,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396251009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:42,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:42,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-16 00:39:42,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714543387] [2021-12-16 00:39:42,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:42,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:39:42,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:39:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:39:42,966 INFO L87 Difference]: Start difference. First operand 629 states and 1023 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:43,104 INFO L93 Difference]: Finished difference Result 1100 states and 1811 transitions. [2021-12-16 00:39:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2021-12-16 00:39:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:43,107 INFO L225 Difference]: With dead ends: 1100 [2021-12-16 00:39:43,107 INFO L226 Difference]: Without dead ends: 649 [2021-12-16 00:39:43,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:39:43,110 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 185 mSDsluCounter, 5002 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 5854 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:43,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 5854 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-12-16 00:39:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 629. [2021-12-16 00:39:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 508 states have (on average 1.6496062992125984) internal successors, (838), 531 states have internal predecessors, (838), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1023 transitions. [2021-12-16 00:39:43,127 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1023 transitions. Word has length 113 [2021-12-16 00:39:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:43,127 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1023 transitions. [2021-12-16 00:39:43,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1023 transitions. [2021-12-16 00:39:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-16 00:39:43,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:43,130 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:43,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:43,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 00:39:43,345 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash -588544878, now seen corresponding path program 1 times [2021-12-16 00:39:43,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:43,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849682274] [2021-12-16 00:39:43,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:43,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:39:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 00:39:43,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849682274] [2021-12-16 00:39:43,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849682274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:43,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45986632] [2021-12-16 00:39:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:43,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:43,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:43,688 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:43,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 00:39:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:43,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:39:43,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:39:44,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:44,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45986632] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:44,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:44,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:44,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702334017] [2021-12-16 00:39:44,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:44,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:44,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:44,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:44,113 INFO L87 Difference]: Start difference. First operand 629 states and 1023 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:44,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:44,162 INFO L93 Difference]: Finished difference Result 1208 states and 1981 transitions. [2021-12-16 00:39:44,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-16 00:39:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:44,165 INFO L225 Difference]: With dead ends: 1208 [2021-12-16 00:39:44,165 INFO L226 Difference]: Without dead ends: 665 [2021-12-16 00:39:44,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:44,167 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 38 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:44,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2563 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-16 00:39:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 653. [2021-12-16 00:39:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 532 states have (on average 1.6278195488721805) internal successors, (866), 555 states have internal predecessors, (866), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:44,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1051 transitions. [2021-12-16 00:39:44,186 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1051 transitions. Word has length 114 [2021-12-16 00:39:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:44,186 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1051 transitions. [2021-12-16 00:39:44,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1051 transitions. [2021-12-16 00:39:44,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-16 00:39:44,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:44,189 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:44,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 00:39:44,415 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash 939496016, now seen corresponding path program 1 times [2021-12-16 00:39:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86032748] [2021-12-16 00:39:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:44,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:39:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 00:39:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 00:39:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:44,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86032748] [2021-12-16 00:39:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86032748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:44,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994943056] [2021-12-16 00:39:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:44,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:44,760 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:44,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 00:39:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1786 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:39:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:39:45,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:45,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994943056] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:45,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:45,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:45,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928674742] [2021-12-16 00:39:45,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:45,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:45,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:45,179 INFO L87 Difference]: Start difference. First operand 653 states and 1051 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:45,309 INFO L93 Difference]: Finished difference Result 1218 states and 2010 transitions. [2021-12-16 00:39:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 114 [2021-12-16 00:39:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:45,314 INFO L225 Difference]: With dead ends: 1218 [2021-12-16 00:39:45,314 INFO L226 Difference]: Without dead ends: 772 [2021-12-16 00:39:45,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:45,317 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 215 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:45,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 2740 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-12-16 00:39:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 655. [2021-12-16 00:39:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 534 states have (on average 1.6254681647940075) internal successors, (868), 557 states have internal predecessors, (868), 93 states have call successors, (93), 24 states have call predecessors, (93), 27 states have return successors, (92), 86 states have call predecessors, (92), 88 states have call successors, (92) [2021-12-16 00:39:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1053 transitions. [2021-12-16 00:39:45,338 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1053 transitions. Word has length 114 [2021-12-16 00:39:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:45,338 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 1053 transitions. [2021-12-16 00:39:45,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1053 transitions. [2021-12-16 00:39:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 00:39:45,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:45,341 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:45,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:45,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:45,563 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -266827908, now seen corresponding path program 1 times [2021-12-16 00:39:45,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757039687] [2021-12-16 00:39:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:45,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:39:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:45,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:45,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757039687] [2021-12-16 00:39:45,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757039687] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:45,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256106262] [2021-12-16 00:39:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:45,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:45,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:45,889 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:45,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 00:39:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 00:39:46,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:39:46,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:46,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256106262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:46,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:46,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2021-12-16 00:39:46,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593529408] [2021-12-16 00:39:46,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:46,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 00:39:46,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 00:39:46,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:39:46,436 INFO L87 Difference]: Start difference. First operand 655 states and 1053 transitions. Second operand has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 00:39:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:49,669 INFO L93 Difference]: Finished difference Result 1937 states and 3235 transitions. [2021-12-16 00:39:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 00:39:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 117 [2021-12-16 00:39:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:49,678 INFO L225 Difference]: With dead ends: 1937 [2021-12-16 00:39:49,678 INFO L226 Difference]: Without dead ends: 1489 [2021-12-16 00:39:49,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-16 00:39:49,681 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 3280 mSDsluCounter, 3417 mSDsCounter, 0 mSdLazyCounter, 5361 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 5082 SdHoareTripleChecker+Invalid, 6304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 5361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:49,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3399 Valid, 5082 Invalid, 6304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 5361 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-16 00:39:49,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2021-12-16 00:39:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1324. [2021-12-16 00:39:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1048 states have (on average 1.6288167938931297) internal successors, (1707), 1095 states have internal predecessors, (1707), 218 states have call successors, (218), 44 states have call predecessors, (218), 57 states have return successors, (251), 215 states have call predecessors, (251), 213 states have call successors, (251) [2021-12-16 00:39:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 2176 transitions. [2021-12-16 00:39:49,753 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 2176 transitions. Word has length 117 [2021-12-16 00:39:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:49,753 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 2176 transitions. [2021-12-16 00:39:49,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-12-16 00:39:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 2176 transitions. [2021-12-16 00:39:49,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-16 00:39:49,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:49,760 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:49,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:49,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:49,975 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:49,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:49,976 INFO L85 PathProgramCache]: Analyzing trace with hash -408092965, now seen corresponding path program 1 times [2021-12-16 00:39:49,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:49,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714802882] [2021-12-16 00:39:49,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:49,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:39:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 00:39:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 00:39:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:50,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714802882] [2021-12-16 00:39:50,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714802882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:50,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625515186] [2021-12-16 00:39:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:50,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:50,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:50,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:50,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 00:39:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:50,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:39:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:39:50,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:50,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625515186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:50,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:50,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-12-16 00:39:50,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060288302] [2021-12-16 00:39:50,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:50,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:39:50,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:50,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:39:50,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:50,761 INFO L87 Difference]: Start difference. First operand 1324 states and 2176 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:51,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:51,085 INFO L93 Difference]: Finished difference Result 3287 states and 5540 transitions. [2021-12-16 00:39:51,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:51,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 118 [2021-12-16 00:39:51,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:51,101 INFO L225 Difference]: With dead ends: 3287 [2021-12-16 00:39:51,102 INFO L226 Difference]: Without dead ends: 2282 [2021-12-16 00:39:51,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-16 00:39:51,108 INFO L933 BasicCegarLoop]: 1355 mSDtfsCounter, 721 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 4752 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:51,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 4752 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:39:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-12-16 00:39:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2263. [2021-12-16 00:39:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 1763 states have (on average 1.6369824163357913) internal successors, (2886), 1844 states have internal predecessors, (2886), 401 states have call successors, (401), 80 states have call predecessors, (401), 98 states have return successors, (472), 400 states have call predecessors, (472), 396 states have call successors, (472) [2021-12-16 00:39:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 3759 transitions. [2021-12-16 00:39:51,212 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 3759 transitions. Word has length 118 [2021-12-16 00:39:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:51,213 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 3759 transitions. [2021-12-16 00:39:51,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 3759 transitions. [2021-12-16 00:39:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-16 00:39:51,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:51,221 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:51,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:51,435 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1535898628, now seen corresponding path program 1 times [2021-12-16 00:39:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:51,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895392473] [2021-12-16 00:39:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:51,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:51,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:39:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 00:39:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 00:39:51,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895392473] [2021-12-16 00:39:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895392473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:51,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667253236] [2021-12-16 00:39:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:51,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:51,778 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:51,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 00:39:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1804 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:39:52,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:39:52,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:52,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667253236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:52,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:52,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-12-16 00:39:52,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282023379] [2021-12-16 00:39:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:52,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:52,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:52,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-12-16 00:39:52,176 INFO L87 Difference]: Start difference. First operand 2263 states and 3759 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:52,289 INFO L93 Difference]: Finished difference Result 4382 states and 7320 transitions. [2021-12-16 00:39:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 00:39:52,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 120 [2021-12-16 00:39:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:52,303 INFO L225 Difference]: With dead ends: 4382 [2021-12-16 00:39:52,304 INFO L226 Difference]: Without dead ends: 2317 [2021-12-16 00:39:52,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-16 00:39:52,315 INFO L933 BasicCegarLoop]: 855 mSDtfsCounter, 39 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:52,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 2560 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-12-16 00:39:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2284. [2021-12-16 00:39:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1783 states have (on average 1.636567582725743) internal successors, (2918), 1865 states have internal predecessors, (2918), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-16 00:39:52,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3792 transitions. [2021-12-16 00:39:52,405 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3792 transitions. Word has length 120 [2021-12-16 00:39:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:52,406 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 3792 transitions. [2021-12-16 00:39:52,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-16 00:39:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3792 transitions. [2021-12-16 00:39:52,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 00:39:52,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:52,415 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:52,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-16 00:39:52,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:52,631 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1928608450, now seen corresponding path program 1 times [2021-12-16 00:39:52,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478312387] [2021-12-16 00:39:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:52,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:39:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:39:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 00:39:52,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478312387] [2021-12-16 00:39:52,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478312387] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901838596] [2021-12-16 00:39:52,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:52,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:52,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:52,997 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:52,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-16 00:39:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 00:39:53,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 00:39:53,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:53,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901838596] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:53,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:53,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 21 [2021-12-16 00:39:53,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138702588] [2021-12-16 00:39:53,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:53,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 00:39:53,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:53,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 00:39:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-12-16 00:39:53,480 INFO L87 Difference]: Start difference. First operand 2284 states and 3792 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:53,647 INFO L93 Difference]: Finished difference Result 4312 states and 7200 transitions. [2021-12-16 00:39:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:39:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2021-12-16 00:39:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:53,661 INFO L225 Difference]: With dead ends: 4312 [2021-12-16 00:39:53,661 INFO L226 Difference]: Without dead ends: 2357 [2021-12-16 00:39:53,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-12-16 00:39:53,672 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 175 mSDsluCounter, 5012 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 5864 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:53,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 5864 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:39:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-12-16 00:39:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2284. [2021-12-16 00:39:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1783 states have (on average 1.6360067302299495) internal successors, (2917), 1865 states have internal predecessors, (2917), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-16 00:39:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3791 transitions. [2021-12-16 00:39:53,753 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3791 transitions. Word has length 121 [2021-12-16 00:39:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 3791 transitions. [2021-12-16 00:39:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 00:39:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3791 transitions. [2021-12-16 00:39:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-16 00:39:53,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:53,761 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:53,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:53,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:53,979 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 232815680, now seen corresponding path program 1 times [2021-12-16 00:39:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:53,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648556326] [2021-12-16 00:39:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:53,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:39:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:54,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:39:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:39:54,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648556326] [2021-12-16 00:39:54,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648556326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418126802] [2021-12-16 00:39:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:54,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:54,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-16 00:39:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 1805 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 00:39:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:39:54,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:54,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418126802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:54,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:54,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2021-12-16 00:39:54,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688762733] [2021-12-16 00:39:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:54,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:39:54,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:39:54,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:39:54,894 INFO L87 Difference]: Start difference. First operand 2284 states and 3791 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 00:39:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:55,161 INFO L93 Difference]: Finished difference Result 2497 states and 4145 transitions. [2021-12-16 00:39:55,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:55,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 121 [2021-12-16 00:39:55,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:55,177 INFO L225 Difference]: With dead ends: 2497 [2021-12-16 00:39:55,177 INFO L226 Difference]: Without dead ends: 2480 [2021-12-16 00:39:55,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:39:55,180 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 895 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:55,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 1564 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 00:39:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-12-16 00:39:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2302. [2021-12-16 00:39:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.6296501943364798) internal successors, (2935), 1883 states have internal predecessors, (2935), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-16 00:39:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3809 transitions. [2021-12-16 00:39:55,282 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3809 transitions. Word has length 121 [2021-12-16 00:39:55,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:55,282 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3809 transitions. [2021-12-16 00:39:55,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-16 00:39:55,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3809 transitions. [2021-12-16 00:39:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-16 00:39:55,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:55,291 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:55,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:55,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:55,515 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:55,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:55,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1691028997, now seen corresponding path program 1 times [2021-12-16 00:39:55,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342871102] [2021-12-16 00:39:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:55,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:39:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:39:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:39:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:39:55,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342871102] [2021-12-16 00:39:55,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342871102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:55,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129913027] [2021-12-16 00:39:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:55,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:55,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:55,916 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:55,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-16 00:39:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:39:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 00:39:56,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:56,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129913027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:56,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:56,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2021-12-16 00:39:56,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597805146] [2021-12-16 00:39:56,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:56,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 00:39:56,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 00:39:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:39:56,415 INFO L87 Difference]: Start difference. First operand 2302 states and 3809 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 00:39:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:56,474 INFO L93 Difference]: Finished difference Result 2331 states and 3847 transitions. [2021-12-16 00:39:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 00:39:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) Word has length 127 [2021-12-16 00:39:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:56,489 INFO L225 Difference]: With dead ends: 2331 [2021-12-16 00:39:56,489 INFO L226 Difference]: Without dead ends: 2314 [2021-12-16 00:39:56,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-16 00:39:56,491 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 37 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:56,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3460 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:56,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-12-16 00:39:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2302. [2021-12-16 00:39:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.626318711826763) internal successors, (2929), 1883 states have internal predecessors, (2929), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-16 00:39:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3803 transitions. [2021-12-16 00:39:56,567 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3803 transitions. Word has length 127 [2021-12-16 00:39:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:56,568 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3803 transitions. [2021-12-16 00:39:56,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 1 states have call successors, (12) [2021-12-16 00:39:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3803 transitions. [2021-12-16 00:39:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-16 00:39:56,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:56,580 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:56,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-16 00:39:56,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 00:39:56,795 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:56,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1168795695, now seen corresponding path program 1 times [2021-12-16 00:39:56,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:56,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816225147] [2021-12-16 00:39:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:56,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 00:39:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:56,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 00:39:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:39:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:39:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-16 00:39:57,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816225147] [2021-12-16 00:39:57,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816225147] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:57,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922493744] [2021-12-16 00:39:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:57,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:57,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:57,216 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:57,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-16 00:39:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-16 00:39:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:39:57,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:57,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922493744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:57,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:57,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [15] total 17 [2021-12-16 00:39:57,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410275342] [2021-12-16 00:39:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:57,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:39:57,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:39:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-12-16 00:39:57,672 INFO L87 Difference]: Start difference. First operand 2302 states and 3803 transitions. Second operand has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:57,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:57,784 INFO L93 Difference]: Finished difference Result 4462 states and 7402 transitions. [2021-12-16 00:39:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 00:39:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 138 [2021-12-16 00:39:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:57,800 INFO L225 Difference]: With dead ends: 4462 [2021-12-16 00:39:57,800 INFO L226 Difference]: Without dead ends: 2385 [2021-12-16 00:39:57,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-12-16 00:39:57,811 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 167 mSDsluCounter, 4186 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 5048 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:57,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 5048 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2021-12-16 00:39:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2302. [2021-12-16 00:39:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2302 states, 1801 states have (on average 1.626318711826763) internal successors, (2929), 1883 states have internal predecessors, (2929), 401 states have call successors, (401), 80 states have call predecessors, (401), 99 states have return successors, (473), 400 states have call predecessors, (473), 396 states have call successors, (473) [2021-12-16 00:39:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2302 states to 2302 states and 3803 transitions. [2021-12-16 00:39:57,914 INFO L78 Accepts]: Start accepts. Automaton has 2302 states and 3803 transitions. Word has length 138 [2021-12-16 00:39:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:57,914 INFO L470 AbstractCegarLoop]: Abstraction has 2302 states and 3803 transitions. [2021-12-16 00:39:57,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:39:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2302 states and 3803 transitions. [2021-12-16 00:39:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-16 00:39:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:57,923 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:57,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-16 00:39:58,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 00:39:58,139 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1825862916, now seen corresponding path program 1 times [2021-12-16 00:39:58,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:58,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261709371] [2021-12-16 00:39:58,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:58,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-16 00:39:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-16 00:39:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 00:39:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:39:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 00:39:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 00:39:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 00:39:58,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:58,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261709371] [2021-12-16 00:39:58,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261709371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:58,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996420250] [2021-12-16 00:39:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:58,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:58,453 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:58,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-16 00:39:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 1859 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 00:39:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:39:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 00:39:58,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:39:58,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996420250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:39:58,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:39:58,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:39:58,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606945799] [2021-12-16 00:39:58,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:39:58,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:39:58,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:39:58,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:39:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:39:58,979 INFO L87 Difference]: Start difference. First operand 2302 states and 3803 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:39:59,046 INFO L93 Difference]: Finished difference Result 4466 states and 7408 transitions. [2021-12-16 00:39:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:39:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-12-16 00:39:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:39:59,058 INFO L225 Difference]: With dead ends: 4466 [2021-12-16 00:39:59,059 INFO L226 Difference]: Without dead ends: 2132 [2021-12-16 00:39:59,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:39:59,067 INFO L933 BasicCegarLoop]: 865 mSDtfsCounter, 11 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 2586 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:39:59,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 2586 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:39:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-12-16 00:39:59,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2132. [2021-12-16 00:39:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 1646 states have (on average 1.6330498177399757) internal successors, (2688), 1722 states have internal predecessors, (2688), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-12-16 00:39:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3543 transitions. [2021-12-16 00:39:59,169 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3543 transitions. Word has length 138 [2021-12-16 00:39:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:39:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3543 transitions. [2021-12-16 00:39:59,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:39:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3543 transitions. [2021-12-16 00:39:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-16 00:39:59,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:39:59,183 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:39:59,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-16 00:39:59,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-16 00:39:59,409 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:39:59,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:39:59,409 INFO L85 PathProgramCache]: Analyzing trace with hash -713032652, now seen corresponding path program 1 times [2021-12-16 00:39:59,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:39:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046587087] [2021-12-16 00:39:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:59,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:39:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:39:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:39:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 00:39:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:39:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 00:39:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:39:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:39:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:39:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:39:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:39:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:39:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:39:59,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:39:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046587087] [2021-12-16 00:39:59,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046587087] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:39:59,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909928725] [2021-12-16 00:39:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:39:59,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:39:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:39:59,756 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:39:59,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-16 00:40:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 00:40:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 00:40:00,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:00,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909928725] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:00,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:00,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-12-16 00:40:00,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057551157] [2021-12-16 00:40:00,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:00,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 00:40:00,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 00:40:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-16 00:40:00,232 INFO L87 Difference]: Start difference. First operand 2132 states and 3543 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:00,325 INFO L93 Difference]: Finished difference Result 4233 states and 7052 transitions. [2021-12-16 00:40:00,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 00:40:00,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-12-16 00:40:00,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:00,338 INFO L225 Difference]: With dead ends: 4233 [2021-12-16 00:40:00,338 INFO L226 Difference]: Without dead ends: 2132 [2021-12-16 00:40:00,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:00,347 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 176 mSDsluCounter, 1595 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 2419 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:00,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 2419 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 00:40:00,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-12-16 00:40:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2132. [2021-12-16 00:40:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 1646 states have (on average 1.6324422843256379) internal successors, (2687), 1722 states have internal predecessors, (2687), 396 states have call successors, (396), 77 states have call predecessors, (396), 89 states have return successors, (459), 394 states have call predecessors, (459), 391 states have call successors, (459) [2021-12-16 00:40:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3542 transitions. [2021-12-16 00:40:00,417 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3542 transitions. Word has length 140 [2021-12-16 00:40:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:00,419 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 3542 transitions. [2021-12-16 00:40:00,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3542 transitions. [2021-12-16 00:40:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-16 00:40:00,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:00,426 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:00,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-16 00:40:00,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 00:40:00,652 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 696289054, now seen corresponding path program 1 times [2021-12-16 00:40:00,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498526811] [2021-12-16 00:40:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:00,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:00,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 00:40:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:40:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-16 00:40:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 00:40:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-16 00:40:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 00:40:01,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498526811] [2021-12-16 00:40:01,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498526811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:01,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:01,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-16 00:40:01,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243416296] [2021-12-16 00:40:01,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:01,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 00:40:01,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 00:40:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-16 00:40:01,110 INFO L87 Difference]: Start difference. First operand 2132 states and 3542 transitions. Second operand has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:08,483 INFO L93 Difference]: Finished difference Result 5562 states and 9599 transitions. [2021-12-16 00:40:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 00:40:08,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) Word has length 141 [2021-12-16 00:40:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:08,500 INFO L225 Difference]: With dead ends: 5562 [2021-12-16 00:40:08,500 INFO L226 Difference]: Without dead ends: 3476 [2021-12-16 00:40:08,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-12-16 00:40:08,508 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1103 mSDsluCounter, 4680 mSDsCounter, 0 mSdLazyCounter, 7346 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 5616 SdHoareTripleChecker+Invalid, 7662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 7346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:08,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 5616 Invalid, 7662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [316 Valid, 7346 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-16 00:40:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-12-16 00:40:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2212. [2021-12-16 00:40:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1710 states have (on average 1.6263157894736842) internal successors, (2781), 1786 states have internal predecessors, (2781), 406 states have call successors, (406), 77 states have call predecessors, (406), 95 states have return successors, (486), 408 states have call predecessors, (486), 401 states have call successors, (486) [2021-12-16 00:40:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3673 transitions. [2021-12-16 00:40:08,744 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3673 transitions. Word has length 141 [2021-12-16 00:40:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:08,745 INFO L470 AbstractCegarLoop]: Abstraction has 2212 states and 3673 transitions. [2021-12-16 00:40:08,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 8.833333333333334) internal successors, (106), 8 states have internal predecessors, (106), 3 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-16 00:40:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3673 transitions. [2021-12-16 00:40:08,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 00:40:08,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:08,752 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:08,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-16 00:40:08,752 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1967551053, now seen corresponding path program 1 times [2021-12-16 00:40:08,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:08,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056288646] [2021-12-16 00:40:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:08,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:08,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:08,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-16 00:40:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 00:40:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-16 00:40:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-16 00:40:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 00:40:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 00:40:09,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:09,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056288646] [2021-12-16 00:40:09,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056288646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:09,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 00:40:09,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 00:40:09,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755809586] [2021-12-16 00:40:09,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:09,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 00:40:09,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:09,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 00:40:09,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 00:40:09,097 INFO L87 Difference]: Start difference. First operand 2212 states and 3673 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:12,959 INFO L93 Difference]: Finished difference Result 3735 states and 6255 transitions. [2021-12-16 00:40:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 00:40:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 145 [2021-12-16 00:40:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:12,967 INFO L225 Difference]: With dead ends: 3735 [2021-12-16 00:40:12,967 INFO L226 Difference]: Without dead ends: 1537 [2021-12-16 00:40:12,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-16 00:40:12,973 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 1350 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2260 SdHoareTripleChecker+Invalid, 2728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:12,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 2260 Invalid, 2728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-16 00:40:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-12-16 00:40:13,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1021. [2021-12-16 00:40:13,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 809 states have (on average 1.6205191594561186) internal successors, (1311), 842 states have internal predecessors, (1311), 167 states have call successors, (167), 42 states have call predecessors, (167), 44 states have return successors, (179), 161 states have call predecessors, (179), 162 states have call successors, (179) [2021-12-16 00:40:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1657 transitions. [2021-12-16 00:40:13,064 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1657 transitions. Word has length 145 [2021-12-16 00:40:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:13,064 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1657 transitions. [2021-12-16 00:40:13,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:13,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1657 transitions. [2021-12-16 00:40:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-16 00:40:13,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:13,082 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:13,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-16 00:40:13,082 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 00:40:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 00:40:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1783603339, now seen corresponding path program 1 times [2021-12-16 00:40:13,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 00:40:13,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797352386] [2021-12-16 00:40:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:13,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 00:40:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-16 00:40:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 00:40:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 00:40:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-16 00:40:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 00:40:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 00:40:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-16 00:40:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 00:40:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 00:40:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-16 00:40:13,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-16 00:40:13,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 00:40:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797352386] [2021-12-16 00:40:13,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797352386] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 00:40:13,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917532819] [2021-12-16 00:40:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 00:40:13,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 00:40:13,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 00:40:13,456 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 00:40:13,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-16 00:40:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 00:40:13,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1870 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 00:40:13,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 00:40:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 00:40:13,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 00:40:13,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917532819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 00:40:13,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 00:40:13,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-12-16 00:40:13,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612518332] [2021-12-16 00:40:13,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 00:40:13,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 00:40:13,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 00:40:13,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 00:40:13,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:13,973 INFO L87 Difference]: Start difference. First operand 1021 states and 1657 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:14,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 00:40:14,156 INFO L93 Difference]: Finished difference Result 2697 states and 4463 transitions. [2021-12-16 00:40:14,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 00:40:14,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 146 [2021-12-16 00:40:14,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 00:40:14,163 INFO L225 Difference]: With dead ends: 2697 [2021-12-16 00:40:14,163 INFO L226 Difference]: Without dead ends: 1793 [2021-12-16 00:40:14,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-16 00:40:14,167 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 786 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 00:40:14,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1675 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 00:40:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2021-12-16 00:40:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1778. [2021-12-16 00:40:14,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1393 states have (on average 1.6195262024407753) internal successors, (2256), 1451 states have internal predecessors, (2256), 306 states have call successors, (306), 76 states have call predecessors, (306), 78 states have return successors, (339), 299 states have call predecessors, (339), 301 states have call successors, (339) [2021-12-16 00:40:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 2901 transitions. [2021-12-16 00:40:14,353 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 2901 transitions. Word has length 146 [2021-12-16 00:40:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 00:40:14,353 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 2901 transitions. [2021-12-16 00:40:14,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-16 00:40:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 2901 transitions. [2021-12-16 00:40:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-16 00:40:14,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 00:40:14,356 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 00:40:14,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0