./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr2.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/array-tiling/pnr2.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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:47:28,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:47:28,205 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:47:28,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:47:28,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:47:28,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:47:28,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:47:28,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:47:28,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:47:28,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:47:28,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:47:28,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:47:28,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:47:28,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:47:28,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:47:28,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:47:28,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:47:28,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:47:28,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:47:28,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:47:28,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:47:28,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:47:28,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:47:28,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:47:28,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:47:28,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:47:28,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:47:28,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:47:28,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:47:28,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:47:28,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:47:28,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:47:28,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:47:28,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:47:28,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:47:28,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:47:28,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:47:28,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:47:28,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:47:28,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:47:28,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:47:28,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:47:28,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:47:28,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:47:28,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:47:28,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:47:28,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:47:28,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:47:28,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:47:28,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:47:28,297 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:47:28,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:47:28,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:47:28,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:47:28,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:47:28,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:47:28,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:47:28,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:47:28,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:47:28,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:47:28,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:47:28,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:47:28,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:47:28,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:47:28,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:47:28,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2021-12-16 22:47:28,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:47:28,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:47:28,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:47:28,529 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:47:28,535 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:47:28,537 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2021-12-16 22:47:28,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c55986e6f/0c98a511421f4f1abe800f3ba04801a8/FLAG7bff8369e [2021-12-16 22:47:28,939 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:47:28,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2021-12-16 22:47:28,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c55986e6f/0c98a511421f4f1abe800f3ba04801a8/FLAG7bff8369e [2021-12-16 22:47:28,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c55986e6f/0c98a511421f4f1abe800f3ba04801a8 [2021-12-16 22:47:28,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:47:28,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:47:28,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:47:28,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:47:28,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:47:28,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:47:28" (1/1) ... [2021-12-16 22:47:28,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3703ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:28, skipping insertion in model container [2021-12-16 22:47:28,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:47:28" (1/1) ... [2021-12-16 22:47:28,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:47:28,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:47:29,103 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/array-tiling/pnr2.c[395,408] [2021-12-16 22:47:29,140 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:47:29,145 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:47:29,157 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/array-tiling/pnr2.c[395,408] [2021-12-16 22:47:29,165 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:47:29,174 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:47:29,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29 WrapperNode [2021-12-16 22:47:29,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:47:29,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:47:29,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:47:29,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:47:29,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,217 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-12-16 22:47:29,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:47:29,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:47:29,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:47:29,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:47:29,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:47:29,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:47:29,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:47:29,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:47:29,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (1/1) ... [2021-12-16 22:47:29,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:47:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:29,268 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 22:47:29,273 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 22:47:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:47:29,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:47:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:47:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 22:47:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-16 22:47:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-16 22:47:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:47:29,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:47:29,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:47:29,356 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:47:29,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:47:29,452 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:47:29,457 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:47:29,457 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 22:47:29,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:47:29 BoogieIcfgContainer [2021-12-16 22:47:29,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:47:29,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:47:29,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:47:29,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:47:29,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:47:28" (1/3) ... [2021-12-16 22:47:29,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be3089d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:47:29, skipping insertion in model container [2021-12-16 22:47:29,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:47:29" (2/3) ... [2021-12-16 22:47:29,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be3089d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:47:29, skipping insertion in model container [2021-12-16 22:47:29,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:47:29" (3/3) ... [2021-12-16 22:47:29,464 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2021-12-16 22:47:29,467 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:47:29,467 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:47:29,496 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:47:29,501 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 22:47:29,501 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:47:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 22:47:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 22:47:29,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:29,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:29,515 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2021-12-16 22:47:29,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:29,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86865866] [2021-12-16 22:47:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:29,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:29,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:29,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86865866] [2021-12-16 22:47:29,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86865866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:47:29,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:47:29,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 22:47:29,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002612616] [2021-12-16 22:47:29,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:47:29,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 22:47:29,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:29,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 22:47:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:47:29,854 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:29,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:29,957 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2021-12-16 22:47:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 22:47:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 22:47:29,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:29,967 INFO L225 Difference]: With dead ends: 66 [2021-12-16 22:47:29,970 INFO L226 Difference]: Without dead ends: 32 [2021-12-16 22:47:29,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:47:29,975 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:29,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-16 22:47:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-12-16 22:47:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 22:47:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-16 22:47:30,004 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-12-16 22:47:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:30,004 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-16 22:47:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 22:47:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-16 22:47:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:47:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:30,006 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:30,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:47:30,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:30,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2021-12-16 22:47:30,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:30,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490869201] [2021-12-16 22:47:30,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:30,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:30,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:30,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:30,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490869201] [2021-12-16 22:47:30,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490869201] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:30,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080433634] [2021-12-16 22:47:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:30,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:30,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:30,243 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 22:47:30,257 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 22:47:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:47:30,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:30,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-16 22:47:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:30,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:47:30,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-12-16 22:47:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:30,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080433634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:30,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:30,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2021-12-16 22:47:30,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868872995] [2021-12-16 22:47:30,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:30,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:47:30,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:47:30,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:47:30,635 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 22:47:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:30,803 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2021-12-16 22:47:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:47:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2021-12-16 22:47:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:30,805 INFO L225 Difference]: With dead ends: 66 [2021-12-16 22:47:30,805 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 22:47:30,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:47:30,807 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:30,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 22:47:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2021-12-16 22:47:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 22:47:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-12-16 22:47:30,833 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2021-12-16 22:47:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:30,834 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-12-16 22:47:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-16 22:47:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-12-16 22:47:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 22:47:30,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:30,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:30,856 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 22:47:31,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:31,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:31,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2021-12-16 22:47:31,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:31,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239628846] [2021-12-16 22:47:31,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:31,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:31,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:31,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:31,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239628846] [2021-12-16 22:47:31,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239628846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105910662] [2021-12-16 22:47:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:31,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:31,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:31,244 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 22:47:31,269 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 22:47:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:47:31,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:31,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:31,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:31,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 22:47:31,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:47:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 22:47:31,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:31,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-12-16 22:47:31,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-16 22:47:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:31,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105910662] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:31,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-16 22:47:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283251796] [2021-12-16 22:47:31,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:31,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:47:31,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:47:31,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:47:31,700 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:47:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:32,255 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-12-16 22:47:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 22:47:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2021-12-16 22:47:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:32,257 INFO L225 Difference]: With dead ends: 116 [2021-12-16 22:47:32,257 INFO L226 Difference]: Without dead ends: 114 [2021-12-16 22:47:32,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 22:47:32,259 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 111 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:32,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 372 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 386 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2021-12-16 22:47:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-16 22:47:32,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2021-12-16 22:47:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 22:47:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-12-16 22:47:32,267 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2021-12-16 22:47:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:32,268 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-12-16 22:47:32,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-16 22:47:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-12-16 22:47:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:47:32,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:32,269 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 22:47:32,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 22:47:32,489 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,SelfDestructingSolverStorable2 [2021-12-16 22:47:32,490 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:32,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:32,493 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2021-12-16 22:47:32,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671528646] [2021-12-16 22:47:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:32,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:32,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:32,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:32,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671528646] [2021-12-16 22:47:32,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671528646] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:32,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908721630] [2021-12-16 22:47:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:32,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:32,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:32,636 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 22:47:32,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:47:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:32,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:47:32,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:32,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:47:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:32,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:32,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:32,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908721630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:32,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:32,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-16 22:47:32,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717178217] [2021-12-16 22:47:32,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:32,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:47:32,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:47:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:47:32,875 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:47:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:33,045 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2021-12-16 22:47:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-16 22:47:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-16 22:47:33,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:33,046 INFO L225 Difference]: With dead ends: 108 [2021-12-16 22:47:33,046 INFO L226 Difference]: Without dead ends: 106 [2021-12-16 22:47:33,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:47:33,047 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:33,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 208 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-16 22:47:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-12-16 22:47:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-16 22:47:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2021-12-16 22:47:33,056 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2021-12-16 22:47:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:33,056 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2021-12-16 22:47:33,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:47:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2021-12-16 22:47:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 22:47:33,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:33,058 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 22:47:33,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:47:33,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:33,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2021-12-16 22:47:33,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:33,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194782641] [2021-12-16 22:47:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:33,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:33,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:33,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194782641] [2021-12-16 22:47:33,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194782641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:33,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592093615] [2021-12-16 22:47:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:33,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:33,394 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 22:47:33,395 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 22:47:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:33,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 22:47:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:33,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:47:33,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:47:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:33,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:47:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:33,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592093615] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:33,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:33,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2021-12-16 22:47:33,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34250768] [2021-12-16 22:47:33,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:33,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 22:47:33,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:33,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 22:47:33,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-16 22:47:33,792 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:47:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:34,172 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2021-12-16 22:47:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:47:34,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2021-12-16 22:47:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:34,174 INFO L225 Difference]: With dead ends: 152 [2021-12-16 22:47:34,174 INFO L226 Difference]: Without dead ends: 150 [2021-12-16 22:47:34,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:47:34,175 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 73 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:34,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 333 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:47:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-16 22:47:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2021-12-16 22:47:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-16 22:47:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2021-12-16 22:47:34,183 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2021-12-16 22:47:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:34,183 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2021-12-16 22:47:34,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:47:34,184 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2021-12-16 22:47:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-16 22:47:34,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:34,197 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:34,217 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 22:47:34,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:34,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2021-12-16 22:47:34,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:34,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218258314] [2021-12-16 22:47:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:34,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:34,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:34,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218258314] [2021-12-16 22:47:34,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218258314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:34,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025750124] [2021-12-16 22:47:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:34,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:34,589 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 22:47:34,591 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 22:47:34,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:34,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 22:47:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:34,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 22:47:35,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025750124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:35,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:35,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2021-12-16 22:47:35,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437951509] [2021-12-16 22:47:35,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:35,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:47:35,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:47:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-12-16 22:47:35,006 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:47:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:35,197 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2021-12-16 22:47:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:47:35,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2021-12-16 22:47:35,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:35,198 INFO L225 Difference]: With dead ends: 104 [2021-12-16 22:47:35,198 INFO L226 Difference]: Without dead ends: 88 [2021-12-16 22:47:35,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:47:35,199 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:35,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-16 22:47:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2021-12-16 22:47:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-16 22:47:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2021-12-16 22:47:35,205 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2021-12-16 22:47:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:35,205 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-12-16 22:47:35,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:47:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2021-12-16 22:47:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:47:35,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:35,206 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:35,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 22:47:35,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:35,423 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:35,423 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2021-12-16 22:47:35,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100195768] [2021-12-16 22:47:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:35,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:35,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:35,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100195768] [2021-12-16 22:47:35,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100195768] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391677148] [2021-12-16 22:47:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:35,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:35,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:35,612 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 22:47:35,613 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 22:47:35,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:35,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:47:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:35,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:35,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:35,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:47:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:35,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:47:35,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:47:35,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:47:36,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 22:47:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:47:36,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:36,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391677148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:36,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:47:36,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-16 22:47:36,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813944191] [2021-12-16 22:47:36,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:36,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 22:47:36,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:36,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 22:47:36,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:47:36,180 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:47:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:36,750 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-12-16 22:47:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-16 22:47:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2021-12-16 22:47:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:36,753 INFO L225 Difference]: With dead ends: 99 [2021-12-16 22:47:36,753 INFO L226 Difference]: Without dead ends: 97 [2021-12-16 22:47:36,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:47:36,754 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:36,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 336 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 393 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2021-12-16 22:47:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-16 22:47:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2021-12-16 22:47:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-16 22:47:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-12-16 22:47:36,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2021-12-16 22:47:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:36,760 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-12-16 22:47:36,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-16 22:47:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-12-16 22:47:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:47:36,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:36,761 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:36,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-16 22:47:36,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:36,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2021-12-16 22:47:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:36,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767582715] [2021-12-16 22:47:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:36,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:37,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767582715] [2021-12-16 22:47:37,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767582715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84769391] [2021-12-16 22:47:37,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:37,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:37,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:37,064 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 22:47:37,065 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 22:47:37,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:47:37,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:47:37,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:37,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:37,197 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:47:37,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:47:37,255 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:47:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:47:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:37,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:37,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:37,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:37,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84769391] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:37,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:37,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2021-12-16 22:47:37,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940562605] [2021-12-16 22:47:37,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:37,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 22:47:37,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:37,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 22:47:37,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-16 22:47:37,375 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 22:47:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:37,614 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2021-12-16 22:47:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:47:37,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-12-16 22:47:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:37,616 INFO L225 Difference]: With dead ends: 158 [2021-12-16 22:47:37,616 INFO L226 Difference]: Without dead ends: 156 [2021-12-16 22:47:37,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:47:37,617 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:37,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:47:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-16 22:47:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2021-12-16 22:47:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-16 22:47:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-12-16 22:47:37,625 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2021-12-16 22:47:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:37,626 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-12-16 22:47:37,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-16 22:47:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-12-16 22:47:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-16 22:47:37,627 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:37,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:37,646 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 22:47:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:37,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2021-12-16 22:47:37,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913842301] [2021-12-16 22:47:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:37,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:37,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913842301] [2021-12-16 22:47:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913842301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:37,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048511667] [2021-12-16 22:47:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:37,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:37,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:37,957 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 22:47:37,958 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 22:47:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:38,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:47:38,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:38,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:38,189 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:47:38,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:47:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:47:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 22:47:38,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:38,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:38,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:47:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:38,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048511667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:38,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:38,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-12-16 22:47:38,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476039392] [2021-12-16 22:47:38,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:38,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 22:47:38,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 22:47:38,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-12-16 22:47:38,543 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 22:47:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:39,307 INFO L93 Difference]: Finished difference Result 250 states and 333 transitions. [2021-12-16 22:47:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-16 22:47:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 47 [2021-12-16 22:47:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:39,310 INFO L225 Difference]: With dead ends: 250 [2021-12-16 22:47:39,310 INFO L226 Difference]: Without dead ends: 248 [2021-12-16 22:47:39,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=472, Invalid=2950, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 22:47:39,312 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:39,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 539 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 613 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-12-16 22:47:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-16 22:47:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-12-16 22:47:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 100 states have (on average 1.32) internal successors, (132), 100 states have internal predecessors, (132), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 22:47:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-12-16 22:47:39,324 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 47 [2021-12-16 22:47:39,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:39,324 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-12-16 22:47:39,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 22:47:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-12-16 22:47:39,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 22:47:39,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:39,326 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:39,343 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 22:47:39,543 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,SelfDestructingSolverStorable8 [2021-12-16 22:47:39,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2021-12-16 22:47:39,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:39,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464511102] [2021-12-16 22:47:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:39,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:39,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:39,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:39,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:39,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:39,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:39,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464511102] [2021-12-16 22:47:39,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464511102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:39,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957381206] [2021-12-16 22:47:39,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:47:39,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:39,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:39,716 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 22:47:39,735 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 22:47:39,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:47:39,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-16 22:47:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:39,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:47:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:39,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:40,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:40,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:40,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957381206] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:40,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:40,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-16 22:47:40,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395729344] [2021-12-16 22:47:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:40,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:47:40,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:47:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:47:40,072 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:40,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:40,648 INFO L93 Difference]: Finished difference Result 392 states and 563 transitions. [2021-12-16 22:47:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-16 22:47:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-12-16 22:47:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:40,651 INFO L225 Difference]: With dead ends: 392 [2021-12-16 22:47:40,651 INFO L226 Difference]: Without dead ends: 390 [2021-12-16 22:47:40,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 22:47:40,652 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 94 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 511 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 22:47:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-16 22:47:40,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 221. [2021-12-16 22:47:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 172 states have (on average 1.3546511627906976) internal successors, (233), 172 states have internal predecessors, (233), 43 states have call successors, (43), 5 states have call predecessors, (43), 5 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-12-16 22:47:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 319 transitions. [2021-12-16 22:47:40,671 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 319 transitions. Word has length 51 [2021-12-16 22:47:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:40,671 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 319 transitions. [2021-12-16 22:47:40,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:47:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 319 transitions. [2021-12-16 22:47:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 22:47:40,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:40,672 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:40,712 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 22:47:40,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:47:40,887 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:40,888 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2021-12-16 22:47:40,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:40,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112156760] [2021-12-16 22:47:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:40,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:41,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112156760] [2021-12-16 22:47:41,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112156760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:41,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244732169] [2021-12-16 22:47:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:41,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:41,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:41,116 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 22:47:41,148 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 22:47:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:41,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-16 22:47:41,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:47:41,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:47:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:41,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:47:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:41,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244732169] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:41,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:41,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2021-12-16 22:47:41,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878357420] [2021-12-16 22:47:41,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:41,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 22:47:41,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 22:47:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-12-16 22:47:41,778 INFO L87 Difference]: Start difference. First operand 221 states and 319 transitions. Second operand has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:43,670 INFO L93 Difference]: Finished difference Result 655 states and 956 transitions. [2021-12-16 22:47:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 22:47:43,671 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 51 [2021-12-16 22:47:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:43,674 INFO L225 Difference]: With dead ends: 655 [2021-12-16 22:47:43,674 INFO L226 Difference]: Without dead ends: 653 [2021-12-16 22:47:43,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=730, Invalid=4240, Unknown=0, NotChecked=0, Total=4970 [2021-12-16 22:47:43,676 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 281 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:43,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 759 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 22:47:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-12-16 22:47:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 143. [2021-12-16 22:47:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 114 states have internal predecessors, (147), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-12-16 22:47:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 193 transitions. [2021-12-16 22:47:43,698 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 193 transitions. Word has length 51 [2021-12-16 22:47:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:43,698 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 193 transitions. [2021-12-16 22:47:43,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 193 transitions. [2021-12-16 22:47:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-16 22:47:43,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:43,699 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:43,715 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 22:47:43,915 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,SelfDestructingSolverStorable10 [2021-12-16 22:47:43,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2021-12-16 22:47:43,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:43,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600746358] [2021-12-16 22:47:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:43,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:44,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:44,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:44,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:44,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:44,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600746358] [2021-12-16 22:47:44,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600746358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:44,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412558602] [2021-12-16 22:47:44,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:47:44,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:44,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:44,171 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 22:47:44,187 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 22:47:44,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-16 22:47:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:44,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 22:47:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:44,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412558602] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:44,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:44,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-16 22:47:44,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392298268] [2021-12-16 22:47:44,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:44,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 22:47:44,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 22:47:44,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 22:47:44,888 INFO L87 Difference]: Start difference. First operand 143 states and 193 transitions. Second operand has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:45,159 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2021-12-16 22:47:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 22:47:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 55 [2021-12-16 22:47:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:45,160 INFO L225 Difference]: With dead ends: 219 [2021-12-16 22:47:45,160 INFO L226 Difference]: Without dead ends: 195 [2021-12-16 22:47:45,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2021-12-16 22:47:45,161 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 331 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:45,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 121 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:47:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-16 22:47:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 157. [2021-12-16 22:47:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 126 states have internal predecessors, (159), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 22:47:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2021-12-16 22:47:45,177 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 55 [2021-12-16 22:47:45,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:45,177 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2021-12-16 22:47:45,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.393939393939394) internal successors, (112), 33 states have internal predecessors, (112), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-16 22:47:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2021-12-16 22:47:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 22:47:45,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:45,178 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:45,191 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 22:47:45,382 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,SelfDestructingSolverStorable11 [2021-12-16 22:47:45,383 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 2 times [2021-12-16 22:47:45,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308349325] [2021-12-16 22:47:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:45,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:47:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:47:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:45,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:45,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308349325] [2021-12-16 22:47:45,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308349325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:45,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870067794] [2021-12-16 22:47:45,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:47:45,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:45,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:45,515 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 22:47:45,516 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 22:47:45,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:47:45,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:45,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 22:47:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:45,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:45,754 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:47:45,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:47:45,830 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:47:45,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:47:45,886 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:47:45,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:47:45,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:47:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 22:47:46,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:48,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870067794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:48,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:47:48,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-12-16 22:47:48,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259283644] [2021-12-16 22:47:48,205 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:48,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 22:47:48,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:48,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 22:47:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=602, Unknown=1, NotChecked=0, Total=702 [2021-12-16 22:47:48,206 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 22:47:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:49,009 INFO L93 Difference]: Finished difference Result 268 states and 345 transitions. [2021-12-16 22:47:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-16 22:47:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 61 [2021-12-16 22:47:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:49,011 INFO L225 Difference]: With dead ends: 268 [2021-12-16 22:47:49,011 INFO L226 Difference]: Without dead ends: 266 [2021-12-16 22:47:49,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=486, Invalid=3295, Unknown=1, NotChecked=0, Total=3782 [2021-12-16 22:47:49,012 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 156 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:49,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 499 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 538 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2021-12-16 22:47:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-16 22:47:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 165. [2021-12-16 22:47:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 132 states have internal predecessors, (163), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 22:47:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 217 transitions. [2021-12-16 22:47:49,028 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 217 transitions. Word has length 61 [2021-12-16 22:47:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:49,028 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 217 transitions. [2021-12-16 22:47:49,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-12-16 22:47:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 217 transitions. [2021-12-16 22:47:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 22:47:49,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:49,030 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:49,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-16 22:47:49,237 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,SelfDestructingSolverStorable12 [2021-12-16 22:47:49,237 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2021-12-16 22:47:49,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:49,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431361384] [2021-12-16 22:47:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:49,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:47:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:47:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:49,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:49,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431361384] [2021-12-16 22:47:49,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431361384] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:49,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234022751] [2021-12-16 22:47:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:47:49,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:49,376 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 22:47:49,377 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 22:47:49,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-16 22:47:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 22:47:49,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:49,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:49,571 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:47:49,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:47:49,694 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:47:49,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:47:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:49,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:49,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:49,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234022751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:49,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:49,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2021-12-16 22:47:49,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573789732] [2021-12-16 22:47:49,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:49,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 22:47:49,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 22:47:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-16 22:47:49,874 INFO L87 Difference]: Start difference. First operand 165 states and 217 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:47:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:50,765 INFO L93 Difference]: Finished difference Result 799 states and 1175 transitions. [2021-12-16 22:47:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 22:47:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 69 [2021-12-16 22:47:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:50,769 INFO L225 Difference]: With dead ends: 799 [2021-12-16 22:47:50,769 INFO L226 Difference]: Without dead ends: 797 [2021-12-16 22:47:50,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:47:50,771 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 116 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:50,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 544 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 22:47:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-12-16 22:47:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 267. [2021-12-16 22:47:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 210 states have (on average 1.3142857142857143) internal successors, (276), 212 states have internal predecessors, (276), 49 states have call successors, (49), 7 states have call predecessors, (49), 7 states have return successors, (49), 47 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-16 22:47:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 374 transitions. [2021-12-16 22:47:50,804 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 374 transitions. Word has length 69 [2021-12-16 22:47:50,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:50,805 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 374 transitions. [2021-12-16 22:47:50,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:47:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 374 transitions. [2021-12-16 22:47:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 22:47:50,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:50,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:50,823 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 22:47:51,018 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,SelfDestructingSolverStorable13 [2021-12-16 22:47:51,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:51,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 3 times [2021-12-16 22:47:51,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:51,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28650874] [2021-12-16 22:47:51,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:51,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:47:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:47:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:51,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:51,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28650874] [2021-12-16 22:47:51,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28650874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:51,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128207470] [2021-12-16 22:47:51,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:47:51,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:51,166 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 22:47:51,174 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 22:47:51,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 22:47:51,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:47:51,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 22:47:51,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:51,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:51,540 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:47:51,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:47:51,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:47:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-16 22:47:51,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:51,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:51,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:47:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:52,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128207470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:52,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:52,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 36 [2021-12-16 22:47:52,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526736350] [2021-12-16 22:47:52,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:52,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-16 22:47:52,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-16 22:47:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:47:52,064 INFO L87 Difference]: Start difference. First operand 267 states and 374 transitions. Second operand has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-16 22:47:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:47:58,023 INFO L93 Difference]: Finished difference Result 699 states and 980 transitions. [2021-12-16 22:47:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-16 22:47:58,023 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) Word has length 69 [2021-12-16 22:47:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:47:58,026 INFO L225 Difference]: With dead ends: 699 [2021-12-16 22:47:58,026 INFO L226 Difference]: Without dead ends: 697 [2021-12-16 22:47:58,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2807 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=917, Invalid=8011, Unknown=2, NotChecked=0, Total=8930 [2021-12-16 22:47:58,029 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 255 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 22:47:58,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 1178 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2008 Invalid, 0 Unknown, 125 Unchecked, 0.8s Time] [2021-12-16 22:47:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-16 22:47:58,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 261. [2021-12-16 22:47:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 202 states have (on average 1.297029702970297) internal successors, (262), 208 states have internal predecessors, (262), 49 states have call successors, (49), 9 states have call predecessors, (49), 9 states have return successors, (49), 43 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-16 22:47:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 360 transitions. [2021-12-16 22:47:58,057 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 360 transitions. Word has length 69 [2021-12-16 22:47:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:47:58,057 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 360 transitions. [2021-12-16 22:47:58,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 36 states have internal predecessors, (132), 12 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-16 22:47:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 360 transitions. [2021-12-16 22:47:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 22:47:58,059 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:47:58,059 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:47:58,100 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 22:47:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:58,275 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:47:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:47:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2021-12-16 22:47:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:47:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6589049] [2021-12-16 22:47:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:47:58,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:47:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:47:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:47:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:47:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:47:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:47:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:47:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:58,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:47:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6589049] [2021-12-16 22:47:58,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6589049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:47:58,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534592687] [2021-12-16 22:47:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:47:58,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:47:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:47:58,414 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 22:47:58,415 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 22:47:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:47:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-16 22:47:58,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:47:58,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:47:58,750 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:47:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:47:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:58,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:47:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:47:58,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:47:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:47:58,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534592687] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:47:58,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:47:58,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2021-12-16 22:47:58,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687527562] [2021-12-16 22:47:58,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:47:58,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-16 22:47:58,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:47:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-16 22:47:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-12-16 22:47:58,912 INFO L87 Difference]: Start difference. First operand 261 states and 360 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:48:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:00,702 INFO L93 Difference]: Finished difference Result 2467 states and 3747 transitions. [2021-12-16 22:48:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-16 22:48:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2021-12-16 22:48:00,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:00,709 INFO L225 Difference]: With dead ends: 2467 [2021-12-16 22:48:00,710 INFO L226 Difference]: Without dead ends: 2465 [2021-12-16 22:48:00,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 22:48:00,712 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 206 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 2291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:00,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 883 Invalid, 2291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 22:48:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-12-16 22:48:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 623. [2021-12-16 22:48:00,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 482 states have (on average 1.3817427385892116) internal successors, (666), 484 states have internal predecessors, (666), 131 states have call successors, (131), 9 states have call predecessors, (131), 9 states have return successors, (131), 129 states have call predecessors, (131), 131 states have call successors, (131) [2021-12-16 22:48:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 928 transitions. [2021-12-16 22:48:00,823 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 928 transitions. Word has length 73 [2021-12-16 22:48:00,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:00,824 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 928 transitions. [2021-12-16 22:48:00,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 22:48:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 928 transitions. [2021-12-16 22:48:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 22:48:00,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:00,826 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:00,857 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 22:48:01,059 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,SelfDestructingSolverStorable15 [2021-12-16 22:48:01,060 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:01,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:01,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2021-12-16 22:48:01,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:01,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959755358] [2021-12-16 22:48:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:01,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959755358] [2021-12-16 22:48:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959755358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254898271] [2021-12-16 22:48:01,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:01,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:01,221 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 22:48:01,222 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 22:48:01,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:01,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:01,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 22:48:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:01,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:48:01,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:01,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:01,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:02,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254898271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:02,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:02,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2021-12-16 22:48:02,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706440520] [2021-12-16 22:48:02,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:02,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-16 22:48:02,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:02,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-16 22:48:02,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2021-12-16 22:48:02,106 INFO L87 Difference]: Start difference. First operand 623 states and 928 transitions. Second operand has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-16 22:48:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:08,540 INFO L93 Difference]: Finished difference Result 4124 states and 6311 transitions. [2021-12-16 22:48:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2021-12-16 22:48:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 73 [2021-12-16 22:48:08,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:08,568 INFO L225 Difference]: With dead ends: 4124 [2021-12-16 22:48:08,572 INFO L226 Difference]: Without dead ends: 4122 [2021-12-16 22:48:08,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13295 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4443, Invalid=31467, Unknown=0, NotChecked=0, Total=35910 [2021-12-16 22:48:08,588 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 432 mSDsluCounter, 1610 mSDsCounter, 0 mSdLazyCounter, 4615 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 4615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:08,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1796 Invalid, 5716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 4615 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-16 22:48:08,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-12-16 22:48:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 283. [2021-12-16 22:48:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 224 states have (on average 1.2723214285714286) internal successors, (285), 230 states have internal predecessors, (285), 49 states have call successors, (49), 9 states have call predecessors, (49), 9 states have return successors, (49), 43 states have call predecessors, (49), 49 states have call successors, (49) [2021-12-16 22:48:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 383 transitions. [2021-12-16 22:48:08,708 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 383 transitions. Word has length 73 [2021-12-16 22:48:08,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:08,708 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 383 transitions. [2021-12-16 22:48:08,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.736842105263158) internal successors, (142), 38 states have internal predecessors, (142), 9 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-16 22:48:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 383 transitions. [2021-12-16 22:48:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-16 22:48:08,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:08,710 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:08,732 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 22:48:08,933 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,SelfDestructingSolverStorable16 [2021-12-16 22:48:08,933 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1212260803, now seen corresponding path program 4 times [2021-12-16 22:48:08,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:08,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716910774] [2021-12-16 22:48:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:08,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:48:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:48:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:09,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716910774] [2021-12-16 22:48:09,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716910774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:09,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992012327] [2021-12-16 22:48:09,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:48:09,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:09,128 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 22:48:09,146 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 22:48:09,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:48:09,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:09,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-16 22:48:09,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:09,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:09,415 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:09,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:09,493 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:09,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:09,550 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:09,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:09,631 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:09,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:09,685 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:09,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:09,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 22:48:09,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992012327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:09,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:48:09,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-16 22:48:09,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440201948] [2021-12-16 22:48:09,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 22:48:09,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 22:48:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-12-16 22:48:09,977 INFO L87 Difference]: Start difference. First operand 283 states and 383 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-16 22:48:11,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:11,005 INFO L93 Difference]: Finished difference Result 362 states and 470 transitions. [2021-12-16 22:48:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-16 22:48:11,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 75 [2021-12-16 22:48:11,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:11,007 INFO L225 Difference]: With dead ends: 362 [2021-12-16 22:48:11,007 INFO L226 Difference]: Without dead ends: 360 [2021-12-16 22:48:11,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=455, Invalid=3085, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 22:48:11,008 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 168 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:11,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 687 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 980 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2021-12-16 22:48:11,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-16 22:48:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 206. [2021-12-16 22:48:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 162 states have (on average 1.2530864197530864) internal successors, (203), 166 states have internal predecessors, (203), 34 states have call successors, (34), 9 states have call predecessors, (34), 9 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-16 22:48:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 271 transitions. [2021-12-16 22:48:11,039 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 271 transitions. Word has length 75 [2021-12-16 22:48:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:11,039 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 271 transitions. [2021-12-16 22:48:11,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-16 22:48:11,039 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 271 transitions. [2021-12-16 22:48:11,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 22:48:11,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:11,040 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:11,073 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 22:48:11,250 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,SelfDestructingSolverStorable17 [2021-12-16 22:48:11,251 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:11,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2021-12-16 22:48:11,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:11,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635982377] [2021-12-16 22:48:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:11,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:11,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:11,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635982377] [2021-12-16 22:48:11,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635982377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:11,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057292079] [2021-12-16 22:48:11,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:48:11,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:11,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:11,523 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 22:48:11,547 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 22:48:11,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:48:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 22:48:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:12,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-16 22:48:12,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057292079] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:12,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:12,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2021-12-16 22:48:12,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226242558] [2021-12-16 22:48:12,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:12,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-16 22:48:12,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:12,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-16 22:48:12,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2021-12-16 22:48:12,526 INFO L87 Difference]: Start difference. First operand 206 states and 271 transitions. Second operand has 42 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-16 22:48:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:12,875 INFO L93 Difference]: Finished difference Result 319 states and 429 transitions. [2021-12-16 22:48:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 22:48:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 77 [2021-12-16 22:48:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:12,876 INFO L225 Difference]: With dead ends: 319 [2021-12-16 22:48:12,876 INFO L226 Difference]: Without dead ends: 287 [2021-12-16 22:48:12,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2021-12-16 22:48:12,877 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 394 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:12,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 193 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:48:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-16 22:48:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 233. [2021-12-16 22:48:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.2526881720430108) internal successors, (233), 187 states have internal predecessors, (233), 37 states have call successors, (37), 9 states have call predecessors, (37), 9 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-16 22:48:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 307 transitions. [2021-12-16 22:48:12,911 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 307 transitions. Word has length 77 [2021-12-16 22:48:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:12,911 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 307 transitions. [2021-12-16 22:48:12,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 42 states have internal predecessors, (154), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-16 22:48:12,912 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 307 transitions. [2021-12-16 22:48:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-16 22:48:12,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:12,912 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:12,931 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 22:48:13,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:13,129 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1410586793, now seen corresponding path program 5 times [2021-12-16 22:48:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:13,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307592107] [2021-12-16 22:48:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:13,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:48:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:48:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:13,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:13,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307592107] [2021-12-16 22:48:13,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307592107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688434583] [2021-12-16 22:48:13,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:48:13,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:13,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:13,315 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 22:48:13,327 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 22:48:13,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 22:48:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-16 22:48:13,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:13,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:13,648 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-12-16 22:48:13,743 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:13,803 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-16 22:48:13,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-16 22:48:13,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-16 22:48:14,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:16,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688434583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:16,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:48:16,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-12-16 22:48:16,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321245712] [2021-12-16 22:48:16,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:16,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-16 22:48:16,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:16,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-16 22:48:16,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1060, Unknown=2, NotChecked=0, Total=1190 [2021-12-16 22:48:16,699 INFO L87 Difference]: Start difference. First operand 233 states and 307 transitions. Second operand has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-16 22:48:18,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:18,008 INFO L93 Difference]: Finished difference Result 343 states and 455 transitions. [2021-12-16 22:48:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-16 22:48:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) Word has length 83 [2021-12-16 22:48:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:18,028 INFO L225 Difference]: With dead ends: 343 [2021-12-16 22:48:18,028 INFO L226 Difference]: Without dead ends: 341 [2021-12-16 22:48:18,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=558, Invalid=4696, Unknown=2, NotChecked=0, Total=5256 [2021-12-16 22:48:18,029 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 182 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:18,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 907 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1394 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2021-12-16 22:48:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-16 22:48:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 161. [2021-12-16 22:48:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 128 states have internal predecessors, (156), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-16 22:48:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 206 transitions. [2021-12-16 22:48:18,065 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 206 transitions. Word has length 83 [2021-12-16 22:48:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:18,066 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 206 transitions. [2021-12-16 22:48:18,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 28 states have internal predecessors, (103), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2021-12-16 22:48:18,066 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 206 transitions. [2021-12-16 22:48:18,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 22:48:18,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:18,067 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:18,097 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 22:48:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:18,284 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2021-12-16 22:48:18,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:18,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237372198] [2021-12-16 22:48:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:18,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:48:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:48:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:18,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:18,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237372198] [2021-12-16 22:48:18,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237372198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:18,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493706300] [2021-12-16 22:48:18,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:48:18,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:18,480 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 22:48:18,509 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 22:48:18,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 22:48:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-16 22:48:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:18,844 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-16 22:48:18,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2021-12-16 22:48:19,043 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:48:19,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:48:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:19,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:19,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:48:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:19,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493706300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:19,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:19,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2021-12-16 22:48:19,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583692519] [2021-12-16 22:48:19,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:19,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 22:48:19,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 22:48:19,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-16 22:48:19,274 INFO L87 Difference]: Start difference. First operand 161 states and 206 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:48:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:48:22,917 INFO L93 Difference]: Finished difference Result 2238 states and 3398 transitions. [2021-12-16 22:48:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-12-16 22:48:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 91 [2021-12-16 22:48:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:48:22,935 INFO L225 Difference]: With dead ends: 2238 [2021-12-16 22:48:22,935 INFO L226 Difference]: Without dead ends: 2236 [2021-12-16 22:48:22,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 185 SyntacticMatches, 7 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8661 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2021-12-16 22:48:22,946 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 250 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 3850 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 4506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 3850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:48:22,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 1418 Invalid, 4506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 3850 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-16 22:48:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-12-16 22:48:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 274. [2021-12-16 22:48:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 212 states have (on average 1.3254716981132075) internal successors, (281), 213 states have internal predecessors, (281), 53 states have call successors, (53), 8 states have call predecessors, (53), 8 states have return successors, (53), 52 states have call predecessors, (53), 53 states have call successors, (53) [2021-12-16 22:48:23,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 387 transitions. [2021-12-16 22:48:23,064 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 387 transitions. Word has length 91 [2021-12-16 22:48:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:48:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 387 transitions. [2021-12-16 22:48:23,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:48:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 387 transitions. [2021-12-16 22:48:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-16 22:48:23,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:48:23,066 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:48:23,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-16 22:48:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-16 22:48:23,282 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:48:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:48:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 6 times [2021-12-16 22:48:23,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:48:23,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232640672] [2021-12-16 22:48:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:48:23,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:48:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:48:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:48:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:48:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:48:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:48:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:48:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:48:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:48:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:48:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:23,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:48:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232640672] [2021-12-16 22:48:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232640672] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:48:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086269766] [2021-12-16 22:48:23,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:48:23,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:48:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:48:23,520 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 22:48:23,522 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 22:48:23,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-16 22:48:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:48:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:48:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:48:23,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:48:24,047 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:48:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:48:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:48:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-16 22:48:24,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:48:26,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:48:26,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:48:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:48:26,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086269766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:48:26,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:48:26,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2021-12-16 22:48:26,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615958407] [2021-12-16 22:48:26,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:48:26,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 22:48:26,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:48:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 22:48:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1814, Unknown=1, NotChecked=0, Total=1980 [2021-12-16 22:48:26,788 INFO L87 Difference]: Start difference. First operand 274 states and 387 transitions. Second operand has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2021-12-16 22:49:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:10,993 INFO L93 Difference]: Finished difference Result 2677 states and 4095 transitions. [2021-12-16 22:49:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2021-12-16 22:49:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) Word has length 91 [2021-12-16 22:49:10,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:11,000 INFO L225 Difference]: With dead ends: 2677 [2021-12-16 22:49:11,001 INFO L226 Difference]: Without dead ends: 2675 [2021-12-16 22:49:11,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22830 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=4243, Invalid=51670, Unknown=19, NotChecked=0, Total=55932 [2021-12-16 22:49:11,009 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 849 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 7577 mSolverCounterSat, 1632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 2759 SdHoareTripleChecker+Invalid, 9495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1632 IncrementalHoareTripleChecker+Valid, 7577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:11,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 2759 Invalid, 9495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1632 Valid, 7577 Invalid, 0 Unknown, 286 Unchecked, 3.3s Time] [2021-12-16 22:49:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2021-12-16 22:49:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 318. [2021-12-16 22:49:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 244 states have (on average 1.3319672131147542) internal successors, (325), 245 states have internal predecessors, (325), 61 states have call successors, (61), 12 states have call predecessors, (61), 12 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2021-12-16 22:49:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 447 transitions. [2021-12-16 22:49:11,150 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 447 transitions. Word has length 91 [2021-12-16 22:49:11,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:11,151 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 447 transitions. [2021-12-16 22:49:11,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 45 states have internal predecessors, (174), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2021-12-16 22:49:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 447 transitions. [2021-12-16 22:49:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:49:11,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:11,153 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:11,171 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 22:49:11,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 22:49:11,367 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:11,368 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2021-12-16 22:49:11,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:11,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885503053] [2021-12-16 22:49:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:11,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:11,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:49:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:49:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:49:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:49:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:49:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:49:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:49:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:49:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:11,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885503053] [2021-12-16 22:49:11,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885503053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:11,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057855224] [2021-12-16 22:49:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:49:11,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:11,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:11,544 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 22:49:11,545 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 22:49:11,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:49:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-16 22:49:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:11,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:49:12,007 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:49:12,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:49:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:12,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:12,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:49:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:49:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:12,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057855224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:12,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:12,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2021-12-16 22:49:12,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260593522] [2021-12-16 22:49:12,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-16 22:49:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-16 22:49:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-12-16 22:49:12,247 INFO L87 Difference]: Start difference. First operand 318 states and 447 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:49:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:20,908 INFO L93 Difference]: Finished difference Result 8173 states and 12697 transitions. [2021-12-16 22:49:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2021-12-16 22:49:20,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2021-12-16 22:49:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:20,930 INFO L225 Difference]: With dead ends: 8173 [2021-12-16 22:49:20,931 INFO L226 Difference]: Without dead ends: 8171 [2021-12-16 22:49:20,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32133 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2021-12-16 22:49:20,935 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 406 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 7075 mSolverCounterSat, 1373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 2633 SdHoareTripleChecker+Invalid, 8448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1373 IncrementalHoareTripleChecker+Valid, 7075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:20,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 2633 Invalid, 8448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1373 Valid, 7075 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 22:49:20,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8171 states. [2021-12-16 22:49:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8171 to 662. [2021-12-16 22:49:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 508 states have (on average 1.389763779527559) internal successors, (706), 509 states have internal predecessors, (706), 141 states have call successors, (141), 12 states have call predecessors, (141), 12 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2021-12-16 22:49:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 988 transitions. [2021-12-16 22:49:21,266 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 988 transitions. Word has length 95 [2021-12-16 22:49:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 988 transitions. [2021-12-16 22:49:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 22:49:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 988 transitions. [2021-12-16 22:49:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 22:49:21,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:21,268 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:21,286 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 22:49:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:21,488 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2021-12-16 22:49:21,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281764285] [2021-12-16 22:49:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:21,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:49:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:49:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:49:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:49:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:49:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:49:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:49:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:49:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:21,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:21,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281764285] [2021-12-16 22:49:21,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281764285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:21,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345511858] [2021-12-16 22:49:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:49:21,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:21,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:21,754 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 22:49:21,755 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 22:49:21,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-16 22:49:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:21,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-16 22:49:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:22,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:49:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:49:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:22,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:22,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:49:22,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:49:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:23,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345511858] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:23,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:23,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2021-12-16 22:49:23,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83506852] [2021-12-16 22:49:23,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:23,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-16 22:49:23,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:23,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-16 22:49:23,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1977, Unknown=0, NotChecked=0, Total=2162 [2021-12-16 22:49:23,038 INFO L87 Difference]: Start difference. First operand 662 states and 988 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 22:49:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:52,571 INFO L93 Difference]: Finished difference Result 12677 states and 19815 transitions. [2021-12-16 22:49:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 501 states. [2021-12-16 22:49:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 95 [2021-12-16 22:49:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:52,599 INFO L225 Difference]: With dead ends: 12677 [2021-12-16 22:49:52,600 INFO L226 Difference]: Without dead ends: 12675 [2021-12-16 22:49:52,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 541 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133871 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=26098, Invalid=268208, Unknown=0, NotChecked=0, Total=294306 [2021-12-16 22:49:52,615 INFO L933 BasicCegarLoop]: 595 mSDtfsCounter, 1116 mSDsluCounter, 3449 mSDsCounter, 0 mSdLazyCounter, 17967 mSolverCounterSat, 5296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 4044 SdHoareTripleChecker+Invalid, 23263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5296 IncrementalHoareTripleChecker+Valid, 17967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:52,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 4044 Invalid, 23263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5296 Valid, 17967 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-12-16 22:49:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12675 states. [2021-12-16 22:49:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12675 to 348. [2021-12-16 22:49:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 274 states have (on average 1.2992700729927007) internal successors, (356), 275 states have internal predecessors, (356), 61 states have call successors, (61), 12 states have call predecessors, (61), 12 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2021-12-16 22:49:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 478 transitions. [2021-12-16 22:49:53,060 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 478 transitions. Word has length 95 [2021-12-16 22:49:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:53,060 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 478 transitions. [2021-12-16 22:49:53,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 12 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 22:49:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 478 transitions. [2021-12-16 22:49:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 22:49:53,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:53,062 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:53,079 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 22:49:53,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:53,275 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2021-12-16 22:49:53,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:53,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311024300] [2021-12-16 22:49:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:53,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:49:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:49:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:49:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:49:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:49:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:49:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:49:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:49:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:53,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311024300] [2021-12-16 22:49:53,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311024300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731500598] [2021-12-16 22:49:53,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:49:53,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:53,630 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 22:49:53,671 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 22:49:53,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-16 22:49:53,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:53,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 22:49:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:54,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:49:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-16 22:49:55,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731500598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:49:55,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:49:55,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 51 [2021-12-16 22:49:55,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27555755] [2021-12-16 22:49:55,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:49:55,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-16 22:49:55,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:49:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-16 22:49:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=1955, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 22:49:55,087 INFO L87 Difference]: Start difference. First operand 348 states and 478 transitions. Second operand has 51 states, 51 states have (on average 3.843137254901961) internal successors, (196), 51 states have internal predecessors, (196), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 22:49:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:49:55,590 INFO L93 Difference]: Finished difference Result 436 states and 594 transitions. [2021-12-16 22:49:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 22:49:55,590 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.843137254901961) internal successors, (196), 51 states have internal predecessors, (196), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 99 [2021-12-16 22:49:55,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:49:55,592 INFO L225 Difference]: With dead ends: 436 [2021-12-16 22:49:55,592 INFO L226 Difference]: Without dead ends: 396 [2021-12-16 22:49:55,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=859, Invalid=2681, Unknown=0, NotChecked=0, Total=3540 [2021-12-16 22:49:55,593 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 301 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:49:55,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 216 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 22:49:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-16 22:49:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 368. [2021-12-16 22:49:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 290 states have (on average 1.282758620689655) internal successors, (372), 291 states have internal predecessors, (372), 65 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2021-12-16 22:49:55,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 502 transitions. [2021-12-16 22:49:55,803 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 502 transitions. Word has length 99 [2021-12-16 22:49:55,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:49:55,803 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 502 transitions. [2021-12-16 22:49:55,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.843137254901961) internal successors, (196), 51 states have internal predecessors, (196), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-12-16 22:49:55,804 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 502 transitions. [2021-12-16 22:49:55,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 22:49:55,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:49:55,821 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:49:55,827 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 22:49:56,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 22:49:56,021 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:49:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:49:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2021-12-16 22:49:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:49:56,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509298516] [2021-12-16 22:49:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:49:56,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:49:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:49:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:49:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:49:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:49:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:49:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:49:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:49:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:49:56,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:49:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 22:49:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:49:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:49:56,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:49:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509298516] [2021-12-16 22:49:56,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509298516] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:49:56,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427330189] [2021-12-16 22:49:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:49:56,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:49:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:49:56,260 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 22:49:56,261 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 22:49:56,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 22:49:56,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:49:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-16 22:49:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:49:56,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:50:08,893 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:50:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2021-12-16 22:50:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-16 22:50:09,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:50:11,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-16 22:50:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-16 22:50:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:50:11,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427330189] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:50:11,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:50:11,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 39 [2021-12-16 22:50:11,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661310514] [2021-12-16 22:50:11,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:50:11,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 22:50:11,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:50:11,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 22:50:11,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1320, Unknown=7, NotChecked=0, Total=1482 [2021-12-16 22:50:11,655 INFO L87 Difference]: Start difference. First operand 368 states and 502 transitions. Second operand has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 13 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-16 22:52:18,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:52:18,749 INFO L93 Difference]: Finished difference Result 1786 states and 2669 transitions. [2021-12-16 22:52:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-12-16 22:52:18,750 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 13 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 113 [2021-12-16 22:52:18,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:52:18,753 INFO L225 Difference]: With dead ends: 1786 [2021-12-16 22:52:18,754 INFO L226 Difference]: Without dead ends: 1784 [2021-12-16 22:52:18,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6221 ImplicationChecksByTransitivity, 138.3s TimeCoverageRelationStatistics Valid=1391, Invalid=16097, Unknown=68, NotChecked=0, Total=17556 [2021-12-16 22:52:18,755 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 269 mSDsluCounter, 1901 mSDsCounter, 0 mSdLazyCounter, 5520 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 2089 SdHoareTripleChecker+Invalid, 6294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 5520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 22:52:18,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 2089 Invalid, 6294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 5520 Invalid, 0 Unknown, 312 Unchecked, 2.3s Time] [2021-12-16 22:52:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-12-16 22:52:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 497. [2021-12-16 22:52:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 383 states have (on average 1.318537859007833) internal successors, (505), 388 states have internal predecessors, (505), 97 states have call successors, (97), 16 states have call predecessors, (97), 16 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-12-16 22:52:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 699 transitions. [2021-12-16 22:52:19,038 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 699 transitions. Word has length 113 [2021-12-16 22:52:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:52:19,038 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 699 transitions. [2021-12-16 22:52:19,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.051282051282051) internal successors, (158), 39 states have internal predecessors, (158), 13 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2021-12-16 22:52:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 699 transitions. [2021-12-16 22:52:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-16 22:52:19,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:52:19,040 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:52:19,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-16 22:52:19,274 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,SelfDestructingSolverStorable25 [2021-12-16 22:52:19,274 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:52:19,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:52:19,275 INFO L85 PathProgramCache]: Analyzing trace with hash -754935820, now seen corresponding path program 7 times [2021-12-16 22:52:19,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:52:19,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170198326] [2021-12-16 22:52:19,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:52:19,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:52:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:52:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:52:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:52:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:52:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:52:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:52:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:52:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:52:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:52:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 22:52:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:52:19,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:52:19,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170198326] [2021-12-16 22:52:19,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170198326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:52:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064538789] [2021-12-16 22:52:19,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:52:19,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:52:19,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:52:19,544 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 22:52:19,550 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 22:52:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:52:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:52:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:52:19,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:52:20,046 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:52:20,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-16 22:52:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:52:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-16 22:52:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:52:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:52:22,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:52:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:52:22,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064538789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:52:22,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:52:22,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2021-12-16 22:52:22,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142126026] [2021-12-16 22:52:22,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:52:22,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-16 22:52:22,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:52:22,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-16 22:52:22,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2659, Unknown=1, NotChecked=0, Total=2862 [2021-12-16 22:52:22,969 INFO L87 Difference]: Start difference. First operand 497 states and 699 transitions. Second operand has 54 states, 54 states have (on average 4.0) internal successors, (216), 54 states have internal predecessors, (216), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-16 22:54:15,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:54:15,245 INFO L93 Difference]: Finished difference Result 3237 states and 4880 transitions. [2021-12-16 22:54:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2021-12-16 22:54:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.0) internal successors, (216), 54 states have internal predecessors, (216), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) Word has length 113 [2021-12-16 22:54:15,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:54:15,252 INFO L225 Difference]: With dead ends: 3237 [2021-12-16 22:54:15,252 INFO L226 Difference]: Without dead ends: 3235 [2021-12-16 22:54:15,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 220 SyntacticMatches, 4 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25770 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=4515, Invalid=60715, Unknown=50, NotChecked=0, Total=65280 [2021-12-16 22:54:15,257 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 739 mSDsluCounter, 2983 mSDsCounter, 0 mSdLazyCounter, 8106 mSolverCounterSat, 1455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 9942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 8106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-16 22:54:15,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 3210 Invalid, 9942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1455 Valid, 8106 Invalid, 0 Unknown, 381 Unchecked, 3.7s Time] [2021-12-16 22:54:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2021-12-16 22:54:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 684. [2021-12-16 22:54:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 530 states have (on average 1.3377358490566038) internal successors, (709), 535 states have internal predecessors, (709), 133 states have call successors, (133), 20 states have call predecessors, (133), 20 states have return successors, (133), 128 states have call predecessors, (133), 133 states have call successors, (133) [2021-12-16 22:54:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 975 transitions. [2021-12-16 22:54:15,679 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 975 transitions. Word has length 113 [2021-12-16 22:54:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:54:15,679 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 975 transitions. [2021-12-16 22:54:15,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.0) internal successors, (216), 54 states have internal predecessors, (216), 18 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 18 states have call predecessors, (30), 18 states have call successors, (30) [2021-12-16 22:54:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 975 transitions. [2021-12-16 22:54:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 22:54:15,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:54:15,681 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:54:15,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-16 22:54:15,898 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,SelfDestructingSolverStorable26 [2021-12-16 22:54:15,899 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:54:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:54:15,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1171866264, now seen corresponding path program 13 times [2021-12-16 22:54:15,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:54:15,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443038097] [2021-12-16 22:54:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:54:15,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:54:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:54:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:54:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:54:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:54:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:54:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:54:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:54:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:54:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:54:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 22:54:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:54:16,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:54:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443038097] [2021-12-16 22:54:16,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443038097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:54:16,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929028329] [2021-12-16 22:54:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:54:16,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:54:16,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:54:16,133 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 22:54:16,134 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 22:54:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:54:16,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-16 22:54:16,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:54:16,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-16 22:54:16,692 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-16 22:54:16,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2021-12-16 22:54:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:54:16,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:54:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:54:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-12-16 22:54:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:54:16,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929028329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:54:16,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:54:16,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2021-12-16 22:54:16,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732922279] [2021-12-16 22:54:16,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:54:16,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 22:54:16,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:54:16,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 22:54:16,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2021-12-16 22:54:16,997 INFO L87 Difference]: Start difference. First operand 684 states and 975 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-16 22:55:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:55:25,331 INFO L93 Difference]: Finished difference Result 60915 states and 95194 transitions. [2021-12-16 22:55:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 924 states. [2021-12-16 22:55:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 117 [2021-12-16 22:55:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:55:25,499 INFO L225 Difference]: With dead ends: 60915 [2021-12-16 22:55:25,499 INFO L226 Difference]: Without dead ends: 60913 [2021-12-16 22:55:25,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422885 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=39010, Invalid=828682, Unknown=0, NotChecked=0, Total=867692 [2021-12-16 22:55:25,558 INFO L933 BasicCegarLoop]: 1245 mSDtfsCounter, 1211 mSDsluCounter, 4693 mSDsCounter, 0 mSdLazyCounter, 23750 mSolverCounterSat, 6269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 5938 SdHoareTripleChecker+Invalid, 30019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6269 IncrementalHoareTripleChecker+Valid, 23750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:55:25,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1227 Valid, 5938 Invalid, 30019 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6269 Valid, 23750 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2021-12-16 22:55:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60913 states. [2021-12-16 22:55:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60913 to 1684. [2021-12-16 22:55:28,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1294 states have (on average 1.4088098918083463) internal successors, (1823), 1295 states have internal predecessors, (1823), 369 states have call successors, (369), 20 states have call predecessors, (369), 20 states have return successors, (369), 368 states have call predecessors, (369), 369 states have call successors, (369) [2021-12-16 22:55:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 2561 transitions. [2021-12-16 22:55:28,078 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 2561 transitions. Word has length 117 [2021-12-16 22:55:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:55:28,078 INFO L470 AbstractCegarLoop]: Abstraction has 1684 states and 2561 transitions. [2021-12-16 22:55:28,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-16 22:55:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 2561 transitions. [2021-12-16 22:55:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-16 22:55:28,081 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:55:28,082 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:55:28,099 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 22:55:28,299 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,SelfDestructingSolverStorable27 [2021-12-16 22:55:28,299 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:55:28,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:55:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2069259542, now seen corresponding path program 4 times [2021-12-16 22:55:28,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:55:28,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443151750] [2021-12-16 22:55:28,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:55:28,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:55:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-16 22:55:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-16 22:55:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:55:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:55:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-16 22:55:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:55:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 22:55:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:55:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-16 22:55:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-16 22:55:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:55:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:55:28,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:55:28,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443151750] [2021-12-16 22:55:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443151750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:55:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987648762] [2021-12-16 22:55:28,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:55:28,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:55:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:55:28,576 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 22:55:28,624 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 22:55:28,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:55:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:55:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 22:55:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:55:29,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 22:55:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 22:55:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:55:29,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:55:29,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-16 22:55:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-12-16 22:55:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-16 22:55:30,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987648762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:55:30,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:55:30,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2021-12-16 22:55:30,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78098589] [2021-12-16 22:55:30,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:55:30,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-16 22:55:30,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:55:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-16 22:55:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2878, Unknown=0, NotChecked=0, Total=3080 [2021-12-16 22:55:30,014 INFO L87 Difference]: Start difference. First operand 1684 states and 2561 transitions. Second operand has 56 states, 56 states have (on average 4.035714285714286) internal successors, (226), 56 states have internal predecessors, (226), 15 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 15 states have call predecessors, (30), 15 states have call successors, (30)