./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/openssl/s3_clnt.blast.02.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:33:55,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:33:55,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:33:55,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:33:55,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:33:55,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:33:55,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:33:55,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:33:55,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:33:55,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:33:55,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:33:55,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:33:55,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:33:55,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:33:55,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:33:55,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:33:55,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:33:55,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:33:55,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:33:55,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:33:55,227 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:33:55,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:33:55,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:33:55,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:33:55,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:33:55,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:33:55,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:33:55,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:33:55,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:33:55,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:33:55,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:33:55,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:33:55,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:33:55,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:33:55,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:33:55,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:33:55,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:33:55,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:33:55,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:33:55,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:33:55,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:33:55,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:33:55,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:33:55,261 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:33:55,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:33:55,262 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:33:55,262 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:33:55,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:33:55,263 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:33:55,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:33:55,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:33:55,264 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:33:55,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:33:55,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:33:55,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:33:55,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:33:55,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:33:55,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:33:55,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:33:55,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:33:55,267 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:33:55,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:33:55,267 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:33:55,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:33:55,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:33:55,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:33:55,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:33:55,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:33:55,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:33:55,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:33:55,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:33:55,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:33:55,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:33:55,270 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:33:55,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:33:55,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:33:55,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0edcf84130f28de31dd252113e98a7277e8f803d45945a4e4ab5373cd867bd6 [2022-07-20 22:33:55,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:33:55,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:33:55,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:33:55,572 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:33:55,573 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:33:55,574 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2022-07-20 22:33:55,622 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128895063/3cd4b1df010641fea3174ece6ce6c026/FLAG625e4979f [2022-07-20 22:33:56,158 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:33:56,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.02.i.cil-2.c [2022-07-20 22:33:56,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128895063/3cd4b1df010641fea3174ece6ce6c026/FLAG625e4979f [2022-07-20 22:33:56,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128895063/3cd4b1df010641fea3174ece6ce6c026 [2022-07-20 22:33:56,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:33:56,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:33:56,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:33:56,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:33:56,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:33:56,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:56" (1/1) ... [2022-07-20 22:33:56,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250d56fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:56, skipping insertion in model container [2022-07-20 22:33:56,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:56" (1/1) ... [2022-07-20 22:33:56,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:33:56,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:33:56,839 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/openssl/s3_clnt.blast.02.i.cil-2.c[65398,65411] [2022-07-20 22:33:56,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:33:56,870 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:33:56,983 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/openssl/s3_clnt.blast.02.i.cil-2.c[65398,65411] [2022-07-20 22:33:56,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:33:57,008 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:33:57,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57 WrapperNode [2022-07-20 22:33:57,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:33:57,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:33:57,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:33:57,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:33:57,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,109 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2022-07-20 22:33:57,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:33:57,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:33:57,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:33:57,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:33:57,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:33:57,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:33:57,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:33:57,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:33:57,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (1/1) ... [2022-07-20 22:33:57,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:33:57,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:33:57,256 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) [2022-07-20 22:33:57,276 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 [2022-07-20 22:33:57,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:33:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 22:33:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:33:57,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:33:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 22:33:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:33:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:33:57,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:33:57,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:33:57,492 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:33:57,493 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:33:57,522 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-20 22:34:00,346 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2022-07-20 22:34:00,346 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2022-07-20 22:34:00,346 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:34:00,352 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:34:00,352 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:34:00,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:34:00 BoogieIcfgContainer [2022-07-20 22:34:00,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:34:00,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:34:00,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:34:00,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:34:00,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:33:56" (1/3) ... [2022-07-20 22:34:00,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561668b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:34:00, skipping insertion in model container [2022-07-20 22:34:00,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:57" (2/3) ... [2022-07-20 22:34:00,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561668b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:34:00, skipping insertion in model container [2022-07-20 22:34:00,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:34:00" (3/3) ... [2022-07-20 22:34:00,361 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.02.i.cil-2.c [2022-07-20 22:34:00,372 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:34:00,372 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:34:00,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:34:00,418 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@121f4f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5444402e [2022-07-20 22:34:00,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:34:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 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) [2022-07-20 22:34:00,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:34:00,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:00,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:00,430 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:00,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2022-07-20 22:34:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:00,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140179535] [2022-07-20 22:34:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:00,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:34:01,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:01,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140179535] [2022-07-20 22:34:01,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140179535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:01,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:01,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881807677] [2022-07-20 22:34:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:01,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:01,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:01,082 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 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) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-07-20 22:34:03,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:03,352 INFO L93 Difference]: Finished difference Result 255 states and 430 transitions. [2022-07-20 22:34:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 24 [2022-07-20 22:34:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:03,363 INFO L225 Difference]: With dead ends: 255 [2022-07-20 22:34:03,363 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 22:34:03,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:03,368 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 7 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:03,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 530 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:34:03,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 22:34:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-07-20 22:34:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.5087719298245614) internal successors, (172), 114 states have internal predecessors, (172), 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) [2022-07-20 22:34:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 172 transitions. [2022-07-20 22:34:03,415 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 172 transitions. Word has length 24 [2022-07-20 22:34:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:03,416 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 172 transitions. [2022-07-20 22:34:03,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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) [2022-07-20 22:34:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 172 transitions. [2022-07-20 22:34:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-20 22:34:03,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:03,419 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:03,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:34:03,420 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:03,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:03,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1001988123, now seen corresponding path program 1 times [2022-07-20 22:34:03,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:03,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107489577] [2022-07-20 22:34:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:03,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 22:34:03,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:03,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107489577] [2022-07-20 22:34:03,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107489577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:03,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:03,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:34:03,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958576043] [2022-07-20 22:34:03,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:03,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:34:03,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:03,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:34:03,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:34:03,705 INFO L87 Difference]: Start difference. First operand 115 states and 172 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-07-20 22:34:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:03,743 INFO L93 Difference]: Finished difference Result 320 states and 482 transitions. [2022-07-20 22:34:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:34:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 38 [2022-07-20 22:34:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:03,750 INFO L225 Difference]: With dead ends: 320 [2022-07-20 22:34:03,751 INFO L226 Difference]: Without dead ends: 215 [2022-07-20 22:34:03,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:34:03,756 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 123 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:03,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 311 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:34:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-20 22:34:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-07-20 22:34:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4906542056074767) internal successors, (319), 214 states have internal predecessors, (319), 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) [2022-07-20 22:34:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 319 transitions. [2022-07-20 22:34:03,788 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 319 transitions. Word has length 38 [2022-07-20 22:34:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:03,789 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 319 transitions. [2022-07-20 22:34:03,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2022-07-20 22:34:03,790 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 319 transitions. [2022-07-20 22:34:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 22:34:03,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:03,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:03,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:34:03,795 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:03,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash 996888307, now seen corresponding path program 1 times [2022-07-20 22:34:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:03,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035222581] [2022-07-20 22:34:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 22:34:03,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035222581] [2022-07-20 22:34:03,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035222581] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:03,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:03,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:34:03,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173167049] [2022-07-20 22:34:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:03,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:34:03,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:34:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:34:03,983 INFO L87 Difference]: Start difference. First operand 215 states and 319 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-07-20 22:34:05,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:06,058 INFO L93 Difference]: Finished difference Result 420 states and 630 transitions. [2022-07-20 22:34:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:34:06,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 53 [2022-07-20 22:34:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:06,061 INFO L225 Difference]: With dead ends: 420 [2022-07-20 22:34:06,061 INFO L226 Difference]: Without dead ends: 315 [2022-07-20 22:34:06,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:34:06,062 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 124 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:06,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 460 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:34:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-20 22:34:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-07-20 22:34:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.484076433121019) internal successors, (466), 314 states have internal predecessors, (466), 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) [2022-07-20 22:34:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 466 transitions. [2022-07-20 22:34:06,076 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 466 transitions. Word has length 53 [2022-07-20 22:34:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:06,076 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 466 transitions. [2022-07-20 22:34:06,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-07-20 22:34:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 466 transitions. [2022-07-20 22:34:06,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-20 22:34:06,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:06,079 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:06,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:34:06,080 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash -973367758, now seen corresponding path program 1 times [2022-07-20 22:34:06,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:06,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578664483] [2022-07-20 22:34:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:06,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578664483] [2022-07-20 22:34:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578664483] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:06,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747149057] [2022-07-20 22:34:06,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:06,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:06,320 INFO L87 Difference]: Start difference. First operand 315 states and 466 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-07-20 22:34:08,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:08,671 INFO L93 Difference]: Finished difference Result 891 states and 1325 transitions. [2022-07-20 22:34:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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 71 [2022-07-20 22:34:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:08,674 INFO L225 Difference]: With dead ends: 891 [2022-07-20 22:34:08,674 INFO L226 Difference]: Without dead ends: 586 [2022-07-20 22:34:08,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:08,676 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:08,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 265 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-20 22:34:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 387. [2022-07-20 22:34:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.5336787564766838) internal successors, (592), 386 states have internal predecessors, (592), 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) [2022-07-20 22:34:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 592 transitions. [2022-07-20 22:34:08,695 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 592 transitions. Word has length 71 [2022-07-20 22:34:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:08,695 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 592 transitions. [2022-07-20 22:34:08,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2022-07-20 22:34:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 592 transitions. [2022-07-20 22:34:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 22:34:08,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:08,701 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:08,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:34:08,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -114315255, now seen corresponding path program 1 times [2022-07-20 22:34:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:08,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488299841] [2022-07-20 22:34:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:08,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:08,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488299841] [2022-07-20 22:34:08,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488299841] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:08,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:08,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:08,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645814653] [2022-07-20 22:34:08,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:08,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:08,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:08,968 INFO L87 Difference]: Start difference. First operand 387 states and 592 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-07-20 22:34:10,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:12,996 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:13,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:13,334 INFO L93 Difference]: Finished difference Result 941 states and 1438 transitions. [2022-07-20 22:34:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:13,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 72 [2022-07-20 22:34:13,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:13,337 INFO L225 Difference]: With dead ends: 941 [2022-07-20 22:34:13,337 INFO L226 Difference]: Without dead ends: 564 [2022-07-20 22:34:13,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:13,338 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 91 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:13,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:34:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-07-20 22:34:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 439. [2022-07-20 22:34:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.552511415525114) internal successors, (680), 438 states have internal predecessors, (680), 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) [2022-07-20 22:34:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 680 transitions. [2022-07-20 22:34:13,361 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 680 transitions. Word has length 72 [2022-07-20 22:34:13,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:13,361 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 680 transitions. [2022-07-20 22:34:13,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-07-20 22:34:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 680 transitions. [2022-07-20 22:34:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 22:34:13,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:13,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:13,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:34:13,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:13,365 INFO L85 PathProgramCache]: Analyzing trace with hash 26233355, now seen corresponding path program 1 times [2022-07-20 22:34:13,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:13,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203446003] [2022-07-20 22:34:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:13,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:13,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203446003] [2022-07-20 22:34:13,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203446003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:13,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:13,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123493817] [2022-07-20 22:34:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:13,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:13,573 INFO L87 Difference]: Start difference. First operand 439 states and 680 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-07-20 22:34:15,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:15,896 INFO L93 Difference]: Finished difference Result 1139 states and 1753 transitions. [2022-07-20 22:34:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 72 [2022-07-20 22:34:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:15,899 INFO L225 Difference]: With dead ends: 1139 [2022-07-20 22:34:15,899 INFO L226 Difference]: Without dead ends: 710 [2022-07-20 22:34:15,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:15,901 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:15,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-07-20 22:34:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 462. [2022-07-20 22:34:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.5704989154013016) internal successors, (724), 461 states have internal predecessors, (724), 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) [2022-07-20 22:34:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2022-07-20 22:34:15,914 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 72 [2022-07-20 22:34:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2022-07-20 22:34:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2022-07-20 22:34:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2022-07-20 22:34:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 22:34:15,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:15,916 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:15,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:34:15,917 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:15,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:15,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1848863885, now seen corresponding path program 1 times [2022-07-20 22:34:15,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:15,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041959294] [2022-07-20 22:34:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:15,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:16,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:16,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041959294] [2022-07-20 22:34:16,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041959294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:16,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:16,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687870271] [2022-07-20 22:34:16,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:16,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:16,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:16,167 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:18,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:20,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:20,514 INFO L93 Difference]: Finished difference Result 1091 states and 1700 transitions. [2022-07-20 22:34:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:20,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 92 [2022-07-20 22:34:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:20,517 INFO L225 Difference]: With dead ends: 1091 [2022-07-20 22:34:20,518 INFO L226 Difference]: Without dead ends: 639 [2022-07-20 22:34:20,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:20,519 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 93 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:20,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 550 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:34:20,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-07-20 22:34:20,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 508. [2022-07-20 22:34:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.581854043392505) internal successors, (802), 507 states have internal predecessors, (802), 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) [2022-07-20 22:34:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 802 transitions. [2022-07-20 22:34:20,545 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 802 transitions. Word has length 92 [2022-07-20 22:34:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:20,546 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 802 transitions. [2022-07-20 22:34:20,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 802 transitions. [2022-07-20 22:34:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 22:34:20,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:20,552 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:34:20,552 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1552617073, now seen corresponding path program 1 times [2022-07-20 22:34:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912694715] [2022-07-20 22:34:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:34:20,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912694715] [2022-07-20 22:34:20,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912694715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:20,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:20,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:20,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091201537] [2022-07-20 22:34:20,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:20,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:20,886 INFO L87 Difference]: Start difference. First operand 508 states and 802 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-07-20 22:34:22,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:24,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:25,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:25,231 INFO L93 Difference]: Finished difference Result 1091 states and 1717 transitions. [2022-07-20 22:34:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:25,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 92 [2022-07-20 22:34:25,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:25,236 INFO L225 Difference]: With dead ends: 1091 [2022-07-20 22:34:25,237 INFO L226 Difference]: Without dead ends: 593 [2022-07-20 22:34:25,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:25,238 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 40 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:25,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 494 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:34:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-07-20 22:34:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 548. [2022-07-20 22:34:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5904936014625228) internal successors, (870), 547 states have internal predecessors, (870), 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) [2022-07-20 22:34:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 870 transitions. [2022-07-20 22:34:25,255 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 870 transitions. Word has length 92 [2022-07-20 22:34:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:25,255 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 870 transitions. [2022-07-20 22:34:25,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-07-20 22:34:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 870 transitions. [2022-07-20 22:34:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 22:34:25,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:25,257 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:25,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:34:25,258 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:25,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1859686006, now seen corresponding path program 1 times [2022-07-20 22:34:25,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160357391] [2022-07-20 22:34:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:25,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160357391] [2022-07-20 22:34:25,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160357391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:25,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:25,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887205132] [2022-07-20 22:34:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:25,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:25,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:25,464 INFO L87 Difference]: Start difference. First operand 548 states and 870 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:34:27,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:27,819 INFO L93 Difference]: Finished difference Result 1282 states and 1998 transitions. [2022-07-20 22:34:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 93 [2022-07-20 22:34:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:27,823 INFO L225 Difference]: With dead ends: 1282 [2022-07-20 22:34:27,823 INFO L226 Difference]: Without dead ends: 744 [2022-07-20 22:34:27,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:27,824 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 108 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:27,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-07-20 22:34:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 548. [2022-07-20 22:34:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5795246800731262) internal successors, (864), 547 states have internal predecessors, (864), 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) [2022-07-20 22:34:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 864 transitions. [2022-07-20 22:34:27,839 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 864 transitions. Word has length 93 [2022-07-20 22:34:27,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:27,840 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 864 transitions. [2022-07-20 22:34:27,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:34:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 864 transitions. [2022-07-20 22:34:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 22:34:27,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:27,842 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:27,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:34:27,842 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:27,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 500641909, now seen corresponding path program 2 times [2022-07-20 22:34:27,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:27,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65910563] [2022-07-20 22:34:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:27,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:28,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65910563] [2022-07-20 22:34:28,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65910563] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:28,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:28,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940545207] [2022-07-20 22:34:28,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:28,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:28,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:28,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:28,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:28,045 INFO L87 Difference]: Start difference. First operand 548 states and 864 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:30,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:32,068 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:32,443 INFO L93 Difference]: Finished difference Result 1279 states and 1983 transitions. [2022-07-20 22:34:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 106 [2022-07-20 22:34:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:32,447 INFO L225 Difference]: With dead ends: 1279 [2022-07-20 22:34:32,447 INFO L226 Difference]: Without dead ends: 741 [2022-07-20 22:34:32,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:32,449 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 111 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:32,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 282 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-07-20 22:34:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-07-20 22:34:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 548. [2022-07-20 22:34:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5612431444241317) internal successors, (854), 547 states have internal predecessors, (854), 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) [2022-07-20 22:34:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 854 transitions. [2022-07-20 22:34:32,467 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 854 transitions. Word has length 106 [2022-07-20 22:34:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:32,468 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 854 transitions. [2022-07-20 22:34:32,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 854 transitions. [2022-07-20 22:34:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 22:34:32,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:32,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 22:34:32,471 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:32,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1117113491, now seen corresponding path program 1 times [2022-07-20 22:34:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153713702] [2022-07-20 22:34:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:32,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:32,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153713702] [2022-07-20 22:34:32,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153713702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:32,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:32,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442621541] [2022-07-20 22:34:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:32,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:32,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:32,790 INFO L87 Difference]: Start difference. First operand 548 states and 854 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:34,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:36,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:37,236 INFO L93 Difference]: Finished difference Result 1209 states and 1869 transitions. [2022-07-20 22:34:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:37,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 106 [2022-07-20 22:34:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:37,240 INFO L225 Difference]: With dead ends: 1209 [2022-07-20 22:34:37,240 INFO L226 Difference]: Without dead ends: 671 [2022-07-20 22:34:37,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:37,242 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 97 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:37,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 538 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2022-07-20 22:34:37,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-07-20 22:34:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 548. [2022-07-20 22:34:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5575868372943327) internal successors, (852), 547 states have internal predecessors, (852), 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) [2022-07-20 22:34:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 852 transitions. [2022-07-20 22:34:37,266 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 852 transitions. Word has length 106 [2022-07-20 22:34:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:37,267 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 852 transitions. [2022-07-20 22:34:37,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 852 transitions. [2022-07-20 22:34:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 22:34:37,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:37,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:37,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:34:37,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:37,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1677813269, now seen corresponding path program 1 times [2022-07-20 22:34:37,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:37,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150982398] [2022-07-20 22:34:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:37,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:37,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150982398] [2022-07-20 22:34:37,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150982398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:37,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:37,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046174483] [2022-07-20 22:34:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:37,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:37,487 INFO L87 Difference]: Start difference. First operand 548 states and 852 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:39,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:41,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:41,762 INFO L93 Difference]: Finished difference Result 1129 states and 1745 transitions. [2022-07-20 22:34:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 106 [2022-07-20 22:34:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:41,766 INFO L225 Difference]: With dead ends: 1129 [2022-07-20 22:34:41,766 INFO L226 Difference]: Without dead ends: 591 [2022-07-20 22:34:41,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:41,769 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 46 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:41,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 492 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:34:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-07-20 22:34:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 548. [2022-07-20 22:34:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5539305301645339) internal successors, (850), 547 states have internal predecessors, (850), 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) [2022-07-20 22:34:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 850 transitions. [2022-07-20 22:34:41,784 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 850 transitions. Word has length 106 [2022-07-20 22:34:41,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:41,784 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 850 transitions. [2022-07-20 22:34:41,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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) [2022-07-20 22:34:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 850 transitions. [2022-07-20 22:34:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 22:34:41,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:41,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:34:41,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:41,787 INFO L85 PathProgramCache]: Analyzing trace with hash -602992740, now seen corresponding path program 1 times [2022-07-20 22:34:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:41,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760016789] [2022-07-20 22:34:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760016789] [2022-07-20 22:34:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760016789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:41,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:41,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001685845] [2022-07-20 22:34:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:41,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:41,979 INFO L87 Difference]: Start difference. First operand 548 states and 850 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-07-20 22:34:43,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:44,380 INFO L93 Difference]: Finished difference Result 1280 states and 1956 transitions. [2022-07-20 22:34:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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 107 [2022-07-20 22:34:44,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:44,384 INFO L225 Difference]: With dead ends: 1280 [2022-07-20 22:34:44,384 INFO L226 Difference]: Without dead ends: 742 [2022-07-20 22:34:44,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:44,386 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:44,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 290 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-07-20 22:34:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 548. [2022-07-20 22:34:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 1.5356489945155394) internal successors, (840), 547 states have internal predecessors, (840), 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) [2022-07-20 22:34:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 840 transitions. [2022-07-20 22:34:44,404 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 840 transitions. Word has length 107 [2022-07-20 22:34:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:44,405 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 840 transitions. [2022-07-20 22:34:44,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2022-07-20 22:34:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 840 transitions. [2022-07-20 22:34:44,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-20 22:34:44,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:44,407 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:44,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:34:44,407 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:44,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1332849040, now seen corresponding path program 1 times [2022-07-20 22:34:44,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:44,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093280253] [2022-07-20 22:34:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:44,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093280253] [2022-07-20 22:34:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093280253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:44,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:44,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:44,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150415104] [2022-07-20 22:34:44,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:44,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:44,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:44,659 INFO L87 Difference]: Start difference. First operand 548 states and 840 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2022-07-20 22:34:46,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:46,993 INFO L93 Difference]: Finished difference Result 1361 states and 2062 transitions. [2022-07-20 22:34:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 107 [2022-07-20 22:34:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:46,997 INFO L225 Difference]: With dead ends: 1361 [2022-07-20 22:34:46,997 INFO L226 Difference]: Without dead ends: 823 [2022-07-20 22:34:46,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:46,999 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 93 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:46,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 266 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-07-20 22:34:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 662. [2022-07-20 22:34:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5567322239031771) internal successors, (1029), 661 states have internal predecessors, (1029), 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) [2022-07-20 22:34:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1029 transitions. [2022-07-20 22:34:47,017 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1029 transitions. Word has length 107 [2022-07-20 22:34:47,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:47,018 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1029 transitions. [2022-07-20 22:34:47,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2022-07-20 22:34:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1029 transitions. [2022-07-20 22:34:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 22:34:47,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:47,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:47,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:34:47,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:47,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1015692680, now seen corresponding path program 1 times [2022-07-20 22:34:47,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224963044] [2022-07-20 22:34:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:47,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224963044] [2022-07-20 22:34:47,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224963044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:47,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:47,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:47,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275754849] [2022-07-20 22:34:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:47,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:47,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:47,231 INFO L87 Difference]: Start difference. First operand 662 states and 1029 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:49,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:49,535 INFO L93 Difference]: Finished difference Result 1508 states and 2314 transitions. [2022-07-20 22:34:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 108 [2022-07-20 22:34:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:49,539 INFO L225 Difference]: With dead ends: 1508 [2022-07-20 22:34:49,540 INFO L226 Difference]: Without dead ends: 856 [2022-07-20 22:34:49,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:49,543 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 115 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:49,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:34:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-07-20 22:34:49,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 662. [2022-07-20 22:34:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5370650529500756) internal successors, (1016), 661 states have internal predecessors, (1016), 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) [2022-07-20 22:34:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1016 transitions. [2022-07-20 22:34:49,580 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1016 transitions. Word has length 108 [2022-07-20 22:34:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1016 transitions. [2022-07-20 22:34:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1016 transitions. [2022-07-20 22:34:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 22:34:49,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:49,583 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:49,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:34:49,583 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:49,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:49,584 INFO L85 PathProgramCache]: Analyzing trace with hash -805941339, now seen corresponding path program 1 times [2022-07-20 22:34:49,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325731411] [2022-07-20 22:34:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:34:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325731411] [2022-07-20 22:34:49,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325731411] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:49,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:49,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:49,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138382682] [2022-07-20 22:34:49,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:49,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:49,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:49,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:49,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:49,874 INFO L87 Difference]: Start difference. First operand 662 states and 1016 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:51,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:53,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:54,249 INFO L93 Difference]: Finished difference Result 1209 states and 1841 transitions. [2022-07-20 22:34:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 108 [2022-07-20 22:34:54,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:54,252 INFO L225 Difference]: With dead ends: 1209 [2022-07-20 22:34:54,252 INFO L226 Difference]: Without dead ends: 785 [2022-07-20 22:34:54,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:54,254 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 89 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:54,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 532 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:34:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-07-20 22:34:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 662. [2022-07-20 22:34:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5340393343419063) internal successors, (1014), 661 states have internal predecessors, (1014), 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) [2022-07-20 22:34:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1014 transitions. [2022-07-20 22:34:54,272 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1014 transitions. Word has length 108 [2022-07-20 22:34:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:54,272 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1014 transitions. [2022-07-20 22:34:54,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:34:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1014 transitions. [2022-07-20 22:34:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 22:34:54,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:54,274 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:54,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:34:54,275 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:54,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:54,275 INFO L85 PathProgramCache]: Analyzing trace with hash -82572025, now seen corresponding path program 1 times [2022-07-20 22:34:54,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:54,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558207936] [2022-07-20 22:34:54,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:54,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:54,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558207936] [2022-07-20 22:34:54,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558207936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:54,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:54,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665285436] [2022-07-20 22:34:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:54,485 INFO L87 Difference]: Start difference. First operand 662 states and 1014 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-20 22:34:56,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:58,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:34:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:34:58,789 INFO L93 Difference]: Finished difference Result 1433 states and 2183 transitions. [2022-07-20 22:34:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:34:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 108 [2022-07-20 22:34:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:34:58,793 INFO L225 Difference]: With dead ends: 1433 [2022-07-20 22:34:58,793 INFO L226 Difference]: Without dead ends: 781 [2022-07-20 22:34:58,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:34:58,794 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 66 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:34:58,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 528 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:34:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-07-20 22:34:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 692. [2022-07-20 22:34:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 691 states have (on average 1.539797395079595) internal successors, (1064), 691 states have internal predecessors, (1064), 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) [2022-07-20 22:34:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1064 transitions. [2022-07-20 22:34:58,826 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1064 transitions. Word has length 108 [2022-07-20 22:34:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:34:58,827 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1064 transitions. [2022-07-20 22:34:58,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-20 22:34:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1064 transitions. [2022-07-20 22:34:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 22:34:58,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:34:58,829 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:34:58,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:34:58,830 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:34:58,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:34:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash 803875412, now seen corresponding path program 1 times [2022-07-20 22:34:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:34:58,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364013442] [2022-07-20 22:34:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:34:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:34:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:34:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:34:59,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:34:59,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364013442] [2022-07-20 22:34:59,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364013442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:34:59,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:34:59,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:34:59,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207235698] [2022-07-20 22:34:59,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:34:59,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:34:59,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:34:59,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:34:59,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:34:59,078 INFO L87 Difference]: Start difference. First operand 692 states and 1064 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-20 22:35:01,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:01,346 INFO L93 Difference]: Finished difference Result 1568 states and 2384 transitions. [2022-07-20 22:35:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 108 [2022-07-20 22:35:01,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:01,350 INFO L225 Difference]: With dead ends: 1568 [2022-07-20 22:35:01,350 INFO L226 Difference]: Without dead ends: 886 [2022-07-20 22:35:01,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:01,352 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 90 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:01,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:35:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-07-20 22:35:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 731. [2022-07-20 22:35:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5602739726027397) internal successors, (1139), 730 states have internal predecessors, (1139), 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) [2022-07-20 22:35:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1139 transitions. [2022-07-20 22:35:01,388 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1139 transitions. Word has length 108 [2022-07-20 22:35:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:01,389 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1139 transitions. [2022-07-20 22:35:01,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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) [2022-07-20 22:35:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1139 transitions. [2022-07-20 22:35:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 22:35:01,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:01,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:01,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:35:01,391 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:01,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1155633319, now seen corresponding path program 1 times [2022-07-20 22:35:01,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:01,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958177448] [2022-07-20 22:35:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:01,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:01,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958177448] [2022-07-20 22:35:01,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958177448] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:01,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:01,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537769698] [2022-07-20 22:35:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:01,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:01,584 INFO L87 Difference]: Start difference. First operand 731 states and 1139 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:35:03,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:05,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:05,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:05,808 INFO L93 Difference]: Finished difference Result 1239 states and 1920 transitions. [2022-07-20 22:35:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:05,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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 108 [2022-07-20 22:35:05,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:05,812 INFO L225 Difference]: With dead ends: 1239 [2022-07-20 22:35:05,812 INFO L226 Difference]: Without dead ends: 774 [2022-07-20 22:35:05,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:05,813 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 39 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:05,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 486 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:35:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-07-20 22:35:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 731. [2022-07-20 22:35:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5575342465753426) internal successors, (1137), 730 states have internal predecessors, (1137), 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) [2022-07-20 22:35:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1137 transitions. [2022-07-20 22:35:05,833 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1137 transitions. Word has length 108 [2022-07-20 22:35:05,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:05,833 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1137 transitions. [2022-07-20 22:35:05,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2022-07-20 22:35:05,833 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1137 transitions. [2022-07-20 22:35:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 22:35:05,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:05,835 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:35:05,835 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 446496737, now seen corresponding path program 1 times [2022-07-20 22:35:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685945720] [2022-07-20 22:35:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:05,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:06,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685945720] [2022-07-20 22:35:06,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685945720] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:06,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:06,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704674724] [2022-07-20 22:35:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:06,019 INFO L87 Difference]: Start difference. First operand 731 states and 1137 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:08,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:10,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:10,386 INFO L93 Difference]: Finished difference Result 1523 states and 2353 transitions. [2022-07-20 22:35:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 109 [2022-07-20 22:35:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:10,390 INFO L225 Difference]: With dead ends: 1523 [2022-07-20 22:35:10,390 INFO L226 Difference]: Without dead ends: 802 [2022-07-20 22:35:10,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:10,392 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 79 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:10,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 510 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:35:10,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-07-20 22:35:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 731. [2022-07-20 22:35:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5547945205479452) internal successors, (1135), 730 states have internal predecessors, (1135), 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) [2022-07-20 22:35:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1135 transitions. [2022-07-20 22:35:10,415 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1135 transitions. Word has length 109 [2022-07-20 22:35:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:10,415 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1135 transitions. [2022-07-20 22:35:10,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:10,416 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1135 transitions. [2022-07-20 22:35:10,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 22:35:10,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:10,417 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:10,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:35:10,418 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:10,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:10,418 INFO L85 PathProgramCache]: Analyzing trace with hash -585249362, now seen corresponding path program 1 times [2022-07-20 22:35:10,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:10,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003435323] [2022-07-20 22:35:10,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:10,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:10,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:10,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003435323] [2022-07-20 22:35:10,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003435323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:10,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:10,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:10,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272864182] [2022-07-20 22:35:10,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:10,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:10,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:10,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:10,627 INFO L87 Difference]: Start difference. First operand 731 states and 1135 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:12,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:14,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:14,927 INFO L93 Difference]: Finished difference Result 1260 states and 1943 transitions. [2022-07-20 22:35:14,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:14,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 109 [2022-07-20 22:35:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:14,931 INFO L225 Difference]: With dead ends: 1260 [2022-07-20 22:35:14,931 INFO L226 Difference]: Without dead ends: 795 [2022-07-20 22:35:14,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:14,932 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 72 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:14,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 502 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:35:14,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-07-20 22:35:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 731. [2022-07-20 22:35:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.5520547945205478) internal successors, (1133), 730 states have internal predecessors, (1133), 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) [2022-07-20 22:35:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1133 transitions. [2022-07-20 22:35:14,953 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1133 transitions. Word has length 109 [2022-07-20 22:35:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:14,953 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 1133 transitions. [2022-07-20 22:35:14,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1133 transitions. [2022-07-20 22:35:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 22:35:14,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:14,956 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:14,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:35:14,956 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:14,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:14,956 INFO L85 PathProgramCache]: Analyzing trace with hash 147177277, now seen corresponding path program 1 times [2022-07-20 22:35:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:14,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684588913] [2022-07-20 22:35:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:35:15,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684588913] [2022-07-20 22:35:15,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684588913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:15,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:15,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:15,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048171699] [2022-07-20 22:35:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:15,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:15,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:15,145 INFO L87 Difference]: Start difference. First operand 731 states and 1133 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-20 22:35:17,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:17,411 INFO L93 Difference]: Finished difference Result 1601 states and 2438 transitions. [2022-07-20 22:35:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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 109 [2022-07-20 22:35:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:17,415 INFO L225 Difference]: With dead ends: 1601 [2022-07-20 22:35:17,415 INFO L226 Difference]: Without dead ends: 880 [2022-07-20 22:35:17,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:17,442 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 87 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:17,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 266 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:35:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-20 22:35:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-20 22:35:17,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5497953615279672) internal successors, (1136), 733 states have internal predecessors, (1136), 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) [2022-07-20 22:35:17,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1136 transitions. [2022-07-20 22:35:17,463 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1136 transitions. Word has length 109 [2022-07-20 22:35:17,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:17,463 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1136 transitions. [2022-07-20 22:35:17,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2022-07-20 22:35:17,463 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1136 transitions. [2022-07-20 22:35:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 22:35:17,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:17,465 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:17,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:35:17,465 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1125768991, now seen corresponding path program 1 times [2022-07-20 22:35:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280743299] [2022-07-20 22:35:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:17,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:17,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:17,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280743299] [2022-07-20 22:35:17,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280743299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:17,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:17,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392137693] [2022-07-20 22:35:17,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:17,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:17,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:17,667 INFO L87 Difference]: Start difference. First operand 734 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:19,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:19,946 INFO L93 Difference]: Finished difference Result 1604 states and 2438 transitions. [2022-07-20 22:35:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:19,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 109 [2022-07-20 22:35:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:19,948 INFO L225 Difference]: With dead ends: 1604 [2022-07-20 22:35:19,948 INFO L226 Difference]: Without dead ends: 880 [2022-07-20 22:35:19,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:19,950 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:19,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 266 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:35:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-20 22:35:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-20 22:35:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.534788540245566) internal successors, (1125), 733 states have internal predecessors, (1125), 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) [2022-07-20 22:35:19,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1125 transitions. [2022-07-20 22:35:19,972 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1125 transitions. Word has length 109 [2022-07-20 22:35:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:19,972 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1125 transitions. [2022-07-20 22:35:19,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:19,972 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1125 transitions. [2022-07-20 22:35:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 22:35:19,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:19,974 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:19,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:35:19,975 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash 94022892, now seen corresponding path program 1 times [2022-07-20 22:35:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:19,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794201233] [2022-07-20 22:35:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:20,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:20,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794201233] [2022-07-20 22:35:20,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794201233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:20,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:20,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:20,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669562271] [2022-07-20 22:35:20,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:20,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:20,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:20,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:20,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:20,166 INFO L87 Difference]: Start difference. First operand 734 states and 1125 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:22,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:24,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:24,360 INFO L93 Difference]: Finished difference Result 1219 states and 1867 transitions. [2022-07-20 22:35:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 109 [2022-07-20 22:35:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:24,362 INFO L225 Difference]: With dead ends: 1219 [2022-07-20 22:35:24,363 INFO L226 Difference]: Without dead ends: 752 [2022-07-20 22:35:24,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:24,364 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:24,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 462 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:35:24,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-20 22:35:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 734. [2022-07-20 22:35:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5320600272851297) internal successors, (1123), 733 states have internal predecessors, (1123), 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) [2022-07-20 22:35:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1123 transitions. [2022-07-20 22:35:24,384 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1123 transitions. Word has length 109 [2022-07-20 22:35:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:24,384 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1123 transitions. [2022-07-20 22:35:24,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2022-07-20 22:35:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1123 transitions. [2022-07-20 22:35:24,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 22:35:24,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:24,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:24,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-20 22:35:24,387 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1469182628, now seen corresponding path program 1 times [2022-07-20 22:35:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:24,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640768770] [2022-07-20 22:35:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:24,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-20 22:35:24,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640768770] [2022-07-20 22:35:24,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640768770] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:24,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:24,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:24,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674841082] [2022-07-20 22:35:24,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:24,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:24,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:24,569 INFO L87 Difference]: Start difference. First operand 734 states and 1123 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-20 22:35:26,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:26,814 INFO L93 Difference]: Finished difference Result 1604 states and 2412 transitions. [2022-07-20 22:35:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 110 [2022-07-20 22:35:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:26,816 INFO L225 Difference]: With dead ends: 1604 [2022-07-20 22:35:26,817 INFO L226 Difference]: Without dead ends: 880 [2022-07-20 22:35:26,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:26,818 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 104 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:26,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 272 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:35:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-20 22:35:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 734. [2022-07-20 22:35:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 1.5170532060027284) internal successors, (1112), 733 states have internal predecessors, (1112), 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) [2022-07-20 22:35:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1112 transitions. [2022-07-20 22:35:26,838 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1112 transitions. Word has length 110 [2022-07-20 22:35:26,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:26,838 INFO L495 AbstractCegarLoop]: Abstraction has 734 states and 1112 transitions. [2022-07-20 22:35:26,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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) [2022-07-20 22:35:26,838 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1112 transitions. [2022-07-20 22:35:26,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 22:35:26,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:26,840 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:26,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-20 22:35:26,840 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 797770585, now seen corresponding path program 1 times [2022-07-20 22:35:26,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:26,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772850763] [2022-07-20 22:35:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:26,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-20 22:35:27,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:27,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772850763] [2022-07-20 22:35:27,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772850763] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:27,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:27,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:27,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906623229] [2022-07-20 22:35:27,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:27,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:27,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:27,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:27,004 INFO L87 Difference]: Start difference. First operand 734 states and 1112 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-20 22:35:29,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:31,038 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:31,265 INFO L93 Difference]: Finished difference Result 1508 states and 2274 transitions. [2022-07-20 22:35:31,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:31,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 110 [2022-07-20 22:35:31,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:31,268 INFO L225 Difference]: With dead ends: 1508 [2022-07-20 22:35:31,268 INFO L226 Difference]: Without dead ends: 784 [2022-07-20 22:35:31,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:31,269 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 41 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:31,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 490 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:35:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-07-20 22:35:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 740. [2022-07-20 22:35:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 1.5128552097428958) internal successors, (1118), 739 states have internal predecessors, (1118), 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) [2022-07-20 22:35:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1118 transitions. [2022-07-20 22:35:31,289 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1118 transitions. Word has length 110 [2022-07-20 22:35:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:31,290 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1118 transitions. [2022-07-20 22:35:31,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2022-07-20 22:35:31,290 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1118 transitions. [2022-07-20 22:35:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 22:35:31,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:31,292 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-20 22:35:31,292 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1886579234, now seen corresponding path program 1 times [2022-07-20 22:35:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389623392] [2022-07-20 22:35:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:31,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 22:35:31,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:31,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389623392] [2022-07-20 22:35:31,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389623392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:31,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:31,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:35:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68453679] [2022-07-20 22:35:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:31,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:35:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:35:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:31,516 INFO L87 Difference]: Start difference. First operand 740 states and 1118 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-07-20 22:35:33,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:33,570 INFO L93 Difference]: Finished difference Result 1472 states and 2231 transitions. [2022-07-20 22:35:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:35:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 110 [2022-07-20 22:35:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:33,574 INFO L225 Difference]: With dead ends: 1472 [2022-07-20 22:35:33,574 INFO L226 Difference]: Without dead ends: 1004 [2022-07-20 22:35:33,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:33,575 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 124 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:33,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 468 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:35:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-07-20 22:35:33,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1004. [2022-07-20 22:35:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.5094715852442673) internal successors, (1514), 1003 states have internal predecessors, (1514), 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) [2022-07-20 22:35:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1514 transitions. [2022-07-20 22:35:33,599 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1514 transitions. Word has length 110 [2022-07-20 22:35:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:33,599 INFO L495 AbstractCegarLoop]: Abstraction has 1004 states and 1514 transitions. [2022-07-20 22:35:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2022-07-20 22:35:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1514 transitions. [2022-07-20 22:35:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-20 22:35:33,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:33,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:33,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-20 22:35:33,602 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:33,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:33,602 INFO L85 PathProgramCache]: Analyzing trace with hash -761801560, now seen corresponding path program 1 times [2022-07-20 22:35:33,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:33,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163897890] [2022-07-20 22:35:33,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:33,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 22:35:33,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:33,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163897890] [2022-07-20 22:35:33,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163897890] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:33,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:33,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:35:33,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929154215] [2022-07-20 22:35:33,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:33,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:35:33,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:35:33,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:33,800 INFO L87 Difference]: Start difference. First operand 1004 states and 1514 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-07-20 22:35:35,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:35,874 INFO L93 Difference]: Finished difference Result 1999 states and 3021 transitions. [2022-07-20 22:35:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:35:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 112 [2022-07-20 22:35:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:35,879 INFO L225 Difference]: With dead ends: 1999 [2022-07-20 22:35:35,880 INFO L226 Difference]: Without dead ends: 1267 [2022-07-20 22:35:35,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:35,881 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 125 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:35,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 467 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 22:35:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-07-20 22:35:35,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-07-20 22:35:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1266 states have (on average 1.5071090047393365) internal successors, (1908), 1266 states have internal predecessors, (1908), 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) [2022-07-20 22:35:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1908 transitions. [2022-07-20 22:35:35,910 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1908 transitions. Word has length 112 [2022-07-20 22:35:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:35,910 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 1908 transitions. [2022-07-20 22:35:35,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2022-07-20 22:35:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1908 transitions. [2022-07-20 22:35:35,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-20 22:35:35,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:35,913 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:35,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-20 22:35:35,913 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash -621252950, now seen corresponding path program 1 times [2022-07-20 22:35:35,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:35,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976947427] [2022-07-20 22:35:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:35,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-20 22:35:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:36,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976947427] [2022-07-20 22:35:36,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976947427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:36,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:36,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:35:36,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866410252] [2022-07-20 22:35:36,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:36,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:35:36,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:36,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:35:36,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:36,085 INFO L87 Difference]: Start difference. First operand 1267 states and 1908 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-07-20 22:35:38,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:38,143 INFO L93 Difference]: Finished difference Result 2501 states and 3773 transitions. [2022-07-20 22:35:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:35:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 112 [2022-07-20 22:35:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:38,147 INFO L225 Difference]: With dead ends: 2501 [2022-07-20 22:35:38,147 INFO L226 Difference]: Without dead ends: 1506 [2022-07-20 22:35:38,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:35:38,149 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 128 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:38,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 467 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 22:35:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-20 22:35:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-20 22:35:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.5056478405315614) internal successors, (2266), 1505 states have internal predecessors, (2266), 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) [2022-07-20 22:35:38,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2266 transitions. [2022-07-20 22:35:38,179 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2266 transitions. Word has length 112 [2022-07-20 22:35:38,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:38,180 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2266 transitions. [2022-07-20 22:35:38,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-07-20 22:35:38,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2266 transitions. [2022-07-20 22:35:38,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 22:35:38,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:38,183 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-20 22:35:38,184 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 676233651, now seen corresponding path program 1 times [2022-07-20 22:35:38,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:38,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406381184] [2022-07-20 22:35:38,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:38,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 161 proven. 5 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-20 22:35:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:38,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406381184] [2022-07-20 22:35:38,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406381184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:35:38,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761264898] [2022-07-20 22:35:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:38,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:35:38,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:35:38,431 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) [2022-07-20 22:35:38,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:35:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:39,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:35:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:35:39,728 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-20 22:35:39,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-20 22:35:39,738 INFO L390 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 123 treesize of output 63 [2022-07-20 22:35:39,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:35:39,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:35:39,977 INFO L390 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 7 treesize of output 3 [2022-07-20 22:35:40,012 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-20 22:35:40,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 21 [2022-07-20 22:35:40,021 INFO L390 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 7 treesize of output 3 [2022-07-20 22:35:40,057 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:35:40,058 INFO L390 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 19 treesize of output 7 [2022-07-20 22:35:40,087 INFO L390 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 20 treesize of output 8 [2022-07-20 22:35:40,112 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:35:40,113 INFO L390 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:35:40,168 INFO L390 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 [2022-07-20 22:35:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 154 proven. 55 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-07-20 22:35:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:35:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-20 22:35:40,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761264898] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:35:40,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:35:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 8] total 10 [2022-07-20 22:35:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566378854] [2022-07-20 22:35:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:40,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:35:40,235 INFO L87 Difference]: Start difference. First operand 1506 states and 2266 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-07-20 22:35:42,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:42,599 INFO L93 Difference]: Finished difference Result 3506 states and 5223 transitions. [2022-07-20 22:35:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 149 [2022-07-20 22:35:42,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:42,608 INFO L225 Difference]: With dead ends: 3506 [2022-07-20 22:35:42,608 INFO L226 Difference]: Without dead ends: 2010 [2022-07-20 22:35:42,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:35:42,611 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 98 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:42,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 280 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 206 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:35:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-07-20 22:35:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1638. [2022-07-20 22:35:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 1.4984728161270617) internal successors, (2453), 1637 states have internal predecessors, (2453), 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) [2022-07-20 22:35:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2453 transitions. [2022-07-20 22:35:42,659 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2453 transitions. Word has length 149 [2022-07-20 22:35:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:42,660 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 2453 transitions. [2022-07-20 22:35:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2022-07-20 22:35:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2453 transitions. [2022-07-20 22:35:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-20 22:35:42,664 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:42,664 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:42,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:35:42,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:35:42,883 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:42,884 INFO L85 PathProgramCache]: Analyzing trace with hash -295976917, now seen corresponding path program 1 times [2022-07-20 22:35:42,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:42,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327876972] [2022-07-20 22:35:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:42,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-07-20 22:35:43,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327876972] [2022-07-20 22:35:43,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327876972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:35:43,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:35:43,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:35:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829024163] [2022-07-20 22:35:43,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:35:43,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:35:43,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:35:43,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:35:43,135 INFO L87 Difference]: Start difference. First operand 1638 states and 2453 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2022-07-20 22:35:45,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:47,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:35:47,388 INFO L93 Difference]: Finished difference Result 3120 states and 4656 transitions. [2022-07-20 22:35:47,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:35:47,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 165 [2022-07-20 22:35:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:35:47,395 INFO L225 Difference]: With dead ends: 3120 [2022-07-20 22:35:47,395 INFO L226 Difference]: Without dead ends: 1776 [2022-07-20 22:35:47,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:35:47,397 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 29 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:35:47,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 464 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:35:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2022-07-20 22:35:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1710. [2022-07-20 22:35:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 1.4961966062024576) internal successors, (2557), 1709 states have internal predecessors, (2557), 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) [2022-07-20 22:35:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2557 transitions. [2022-07-20 22:35:47,435 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2557 transitions. Word has length 165 [2022-07-20 22:35:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:35:47,435 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 2557 transitions. [2022-07-20 22:35:47,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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) [2022-07-20 22:35:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2557 transitions. [2022-07-20 22:35:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-20 22:35:47,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:35:47,439 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:35:47,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-20 22:35:47,439 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:35:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:35:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1679882959, now seen corresponding path program 1 times [2022-07-20 22:35:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:35:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118288894] [2022-07-20 22:35:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:47,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:35:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 204 proven. 20 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-20 22:35:47,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:35:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118288894] [2022-07-20 22:35:47,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118288894] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:35:47,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607074707] [2022-07-20 22:35:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:35:47,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:35:47,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:35:47,668 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) [2022-07-20 22:35:47,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:35:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:35:48,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:35:48,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:35:48,758 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-20 22:35:48,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-20 22:35:48,762 INFO L390 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 123 treesize of output 63 [2022-07-20 22:35:48,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:35:48,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:35:48,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2022-07-20 22:35:48,850 INFO L390 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 7 treesize of output 3 [2022-07-20 22:35:48,865 INFO L390 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 7 treesize of output 3 [2022-07-20 22:35:48,889 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:35:48,889 INFO L390 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 19 treesize of output 7 [2022-07-20 22:35:48,903 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:35:48,903 INFO L390 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:35:48,932 INFO L390 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 [2022-07-20 22:35:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 229 proven. 40 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 22:35:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:35:48,995 INFO L390 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 10 treesize of output 4 [2022-07-20 22:35:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 235 proven. 10 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-20 22:35:49,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607074707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:35:49,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:35:49,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 14 [2022-07-20 22:35:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123856867] [2022-07-20 22:35:49,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:35:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:35:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:35:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:35:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:35:49,048 INFO L87 Difference]: Start difference. First operand 1710 states and 2557 transitions. Second operand has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 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) [2022-07-20 22:35:51,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:53,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:55,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:57,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:35:59,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:01,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:03,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:05,314 INFO L93 Difference]: Finished difference Result 4575 states and 6690 transitions. [2022-07-20 22:36:05,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 22:36:05,315 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 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 179 [2022-07-20 22:36:05,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:05,323 INFO L225 Difference]: With dead ends: 4575 [2022-07-20 22:36:05,324 INFO L226 Difference]: Without dead ends: 2875 [2022-07-20 22:36:05,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 22:36:05,331 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 702 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 231 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1979 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:05,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1979 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1968 Invalid, 7 Unknown, 0 Unchecked, 15.9s Time] [2022-07-20 22:36:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-07-20 22:36:05,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 1574. [2022-07-20 22:36:05,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.45645263827082) internal successors, (2291), 1573 states have internal predecessors, (2291), 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) [2022-07-20 22:36:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2291 transitions. [2022-07-20 22:36:05,396 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2291 transitions. Word has length 179 [2022-07-20 22:36:05,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:05,396 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2291 transitions. [2022-07-20 22:36:05,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.285714285714286) internal successors, (172), 14 states have internal predecessors, (172), 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) [2022-07-20 22:36:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2291 transitions. [2022-07-20 22:36:05,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-20 22:36:05,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:05,400 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:05,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:36:05,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 22:36:05,620 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash -114643748, now seen corresponding path program 1 times [2022-07-20 22:36:05,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:05,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871108673] [2022-07-20 22:36:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-20 22:36:05,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:05,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871108673] [2022-07-20 22:36:05,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871108673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:05,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:05,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737910402] [2022-07-20 22:36:05,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:05,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:05,821 INFO L87 Difference]: Start difference. First operand 1574 states and 2291 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2022-07-20 22:36:07,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:09,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:10,145 INFO L93 Difference]: Finished difference Result 3035 states and 4405 transitions. [2022-07-20 22:36:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 186 [2022-07-20 22:36:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:10,149 INFO L225 Difference]: With dead ends: 3035 [2022-07-20 22:36:10,150 INFO L226 Difference]: Without dead ends: 1769 [2022-07-20 22:36:10,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:10,152 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 76 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:10,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 509 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 22:36:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2022-07-20 22:36:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1574. [2022-07-20 22:36:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 1.4539097266369994) internal successors, (2287), 1573 states have internal predecessors, (2287), 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) [2022-07-20 22:36:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2287 transitions. [2022-07-20 22:36:10,187 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2287 transitions. Word has length 186 [2022-07-20 22:36:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:10,188 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 2287 transitions. [2022-07-20 22:36:10,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2022-07-20 22:36:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2287 transitions. [2022-07-20 22:36:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-07-20 22:36:10,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:10,191 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:10,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-20 22:36:10,191 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1707611224, now seen corresponding path program 1 times [2022-07-20 22:36:10,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:10,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176637268] [2022-07-20 22:36:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 422 proven. 6 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-20 22:36:10,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176637268] [2022-07-20 22:36:10,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176637268] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:36:10,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000031723] [2022-07-20 22:36:10,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:36:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:36:10,425 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) [2022-07-20 22:36:10,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:36:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:11,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:36:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:36:11,638 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-20 22:36:11,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-20 22:36:11,641 INFO L390 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 123 treesize of output 63 [2022-07-20 22:36:11,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:36:11,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:36:11,745 INFO L390 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 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-20 22:36:11,748 INFO L390 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 7 treesize of output 3 [2022-07-20 22:36:11,835 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:36:11,836 INFO L390 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 19 treesize of output 7 [2022-07-20 22:36:11,851 INFO L390 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 20 treesize of output 8 [2022-07-20 22:36:11,864 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:36:11,864 INFO L390 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:36:11,894 INFO L390 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 [2022-07-20 22:36:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 415 proven. 56 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-20 22:36:11,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:36:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 417 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-20 22:36:11,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000031723] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-20 22:36:11,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-20 22:36:11,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2022-07-20 22:36:11,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167477683] [2022-07-20 22:36:11,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:11,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:11,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:11,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:11,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 22:36:11,934 INFO L87 Difference]: Start difference. First operand 1574 states and 2287 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2022-07-20 22:36:13,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:14,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:14,254 INFO L93 Difference]: Finished difference Result 3175 states and 4588 transitions. [2022-07-20 22:36:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:14,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 205 [2022-07-20 22:36:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:14,260 INFO L225 Difference]: With dead ends: 3175 [2022-07-20 22:36:14,260 INFO L226 Difference]: Without dead ends: 1909 [2022-07-20 22:36:14,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:36:14,262 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 101 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:14,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 464 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 22:36:14,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-07-20 22:36:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1576. [2022-07-20 22:36:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4444444444444444) internal successors, (2275), 1575 states have internal predecessors, (2275), 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) [2022-07-20 22:36:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2275 transitions. [2022-07-20 22:36:14,353 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2275 transitions. Word has length 205 [2022-07-20 22:36:14,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:14,353 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2275 transitions. [2022-07-20 22:36:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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) [2022-07-20 22:36:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2275 transitions. [2022-07-20 22:36:14,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-20 22:36:14,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:14,356 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:14,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:36:14,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:36:14,583 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:14,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1716286178, now seen corresponding path program 1 times [2022-07-20 22:36:14,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:14,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410655677] [2022-07-20 22:36:14,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:14,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-20 22:36:14,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:14,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410655677] [2022-07-20 22:36:14,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410655677] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:14,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:14,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:14,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369883561] [2022-07-20 22:36:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:14,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:14,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:14,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:14,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:14,785 INFO L87 Difference]: Start difference. First operand 1576 states and 2275 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2022-07-20 22:36:16,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:17,054 INFO L93 Difference]: Finished difference Result 3383 states and 4832 transitions. [2022-07-20 22:36:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 222 [2022-07-20 22:36:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:17,058 INFO L225 Difference]: With dead ends: 3383 [2022-07-20 22:36:17,058 INFO L226 Difference]: Without dead ends: 1817 [2022-07-20 22:36:17,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:17,060 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 85 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:17,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 280 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2022-07-20 22:36:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 1576. [2022-07-20 22:36:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4412698412698413) internal successors, (2270), 1575 states have internal predecessors, (2270), 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) [2022-07-20 22:36:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2270 transitions. [2022-07-20 22:36:17,095 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2270 transitions. Word has length 222 [2022-07-20 22:36:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:17,096 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2270 transitions. [2022-07-20 22:36:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2022-07-20 22:36:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2270 transitions. [2022-07-20 22:36:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-20 22:36:17,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:17,099 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:17,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-20 22:36:17,099 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash -773653108, now seen corresponding path program 1 times [2022-07-20 22:36:17,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:17,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978280044] [2022-07-20 22:36:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:17,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-20 22:36:17,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:17,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978280044] [2022-07-20 22:36:17,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978280044] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:17,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:17,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:17,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30046671] [2022-07-20 22:36:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:17,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:17,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:17,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:17,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:17,333 INFO L87 Difference]: Start difference. First operand 1576 states and 2270 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2022-07-20 22:36:19,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:19,595 INFO L93 Difference]: Finished difference Result 3368 states and 4802 transitions. [2022-07-20 22:36:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 224 [2022-07-20 22:36:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:19,597 INFO L225 Difference]: With dead ends: 3368 [2022-07-20 22:36:19,597 INFO L226 Difference]: Without dead ends: 1797 [2022-07-20 22:36:19,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:19,599 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 79 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:19,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 278 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-07-20 22:36:19,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1586. [2022-07-20 22:36:19,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 1.4416403785488958) internal successors, (2285), 1585 states have internal predecessors, (2285), 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) [2022-07-20 22:36:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 2285 transitions. [2022-07-20 22:36:19,638 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 2285 transitions. Word has length 224 [2022-07-20 22:36:19,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:19,638 INFO L495 AbstractCegarLoop]: Abstraction has 1586 states and 2285 transitions. [2022-07-20 22:36:19,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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) [2022-07-20 22:36:19,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 2285 transitions. [2022-07-20 22:36:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-20 22:36:19,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:19,641 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:19,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-20 22:36:19,642 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1248972930, now seen corresponding path program 1 times [2022-07-20 22:36:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:19,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109503914] [2022-07-20 22:36:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 511 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 22:36:19,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:19,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109503914] [2022-07-20 22:36:19,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109503914] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:19,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:19,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720163925] [2022-07-20 22:36:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:19,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:19,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:19,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:19,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:19,855 INFO L87 Difference]: Start difference. First operand 1586 states and 2285 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2022-07-20 22:36:21,864 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:22,152 INFO L93 Difference]: Finished difference Result 3583 states and 5112 transitions. [2022-07-20 22:36:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:22,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 252 [2022-07-20 22:36:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:22,156 INFO L225 Difference]: With dead ends: 3583 [2022-07-20 22:36:22,156 INFO L226 Difference]: Without dead ends: 2007 [2022-07-20 22:36:22,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:22,157 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 86 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:22,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 280 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-07-20 22:36:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1751. [2022-07-20 22:36:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 1.4342857142857144) internal successors, (2510), 1750 states have internal predecessors, (2510), 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) [2022-07-20 22:36:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2510 transitions. [2022-07-20 22:36:22,204 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2510 transitions. Word has length 252 [2022-07-20 22:36:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:22,205 INFO L495 AbstractCegarLoop]: Abstraction has 1751 states and 2510 transitions. [2022-07-20 22:36:22,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2022-07-20 22:36:22,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2510 transitions. [2022-07-20 22:36:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-20 22:36:22,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:22,208 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:22,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-20 22:36:22,209 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:22,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2101549089, now seen corresponding path program 1 times [2022-07-20 22:36:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:22,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896069798] [2022-07-20 22:36:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 513 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 22:36:22,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:22,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896069798] [2022-07-20 22:36:22,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896069798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:22,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:22,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:22,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761802171] [2022-07-20 22:36:22,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:22,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:22,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:22,578 INFO L87 Difference]: Start difference. First operand 1751 states and 2510 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2022-07-20 22:36:24,592 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:24,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:24,868 INFO L93 Difference]: Finished difference Result 3908 states and 5552 transitions. [2022-07-20 22:36:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:24,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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 252 [2022-07-20 22:36:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:24,872 INFO L225 Difference]: With dead ends: 3908 [2022-07-20 22:36:24,872 INFO L226 Difference]: Without dead ends: 2167 [2022-07-20 22:36:24,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:24,874 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 84 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:24,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 282 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2022-07-20 22:36:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1921. [2022-07-20 22:36:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4296875) internal successors, (2745), 1920 states have internal predecessors, (2745), 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) [2022-07-20 22:36:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2745 transitions. [2022-07-20 22:36:24,911 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2745 transitions. Word has length 252 [2022-07-20 22:36:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:24,911 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2745 transitions. [2022-07-20 22:36:24,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 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) [2022-07-20 22:36:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2745 transitions. [2022-07-20 22:36:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 22:36:24,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:24,915 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:24,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-20 22:36:24,915 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:24,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1350270675, now seen corresponding path program 1 times [2022-07-20 22:36:24,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:24,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773378002] [2022-07-20 22:36:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 512 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 22:36:25,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:25,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773378002] [2022-07-20 22:36:25,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773378002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:25,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:25,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:25,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783726929] [2022-07-20 22:36:25,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:25,144 INFO L87 Difference]: Start difference. First operand 1921 states and 2745 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-07-20 22:36:27,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:27,400 INFO L93 Difference]: Finished difference Result 4043 states and 5727 transitions. [2022-07-20 22:36:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 253 [2022-07-20 22:36:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:27,405 INFO L225 Difference]: With dead ends: 4043 [2022-07-20 22:36:27,406 INFO L226 Difference]: Without dead ends: 2132 [2022-07-20 22:36:27,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:27,408 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 85 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:27,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 280 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:27,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-20 22:36:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-20 22:36:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4192708333333333) internal successors, (2725), 1920 states have internal predecessors, (2725), 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) [2022-07-20 22:36:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2725 transitions. [2022-07-20 22:36:27,455 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2725 transitions. Word has length 253 [2022-07-20 22:36:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:27,456 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2725 transitions. [2022-07-20 22:36:27,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-07-20 22:36:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2725 transitions. [2022-07-20 22:36:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-20 22:36:27,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:27,459 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:27,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-07-20 22:36:27,460 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:27,460 INFO L85 PathProgramCache]: Analyzing trace with hash -952042518, now seen corresponding path program 1 times [2022-07-20 22:36:27,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687627852] [2022-07-20 22:36:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 514 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 22:36:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:27,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687627852] [2022-07-20 22:36:27,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687627852] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:27,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:27,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:27,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305602852] [2022-07-20 22:36:27,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:27,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:27,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:27,680 INFO L87 Difference]: Start difference. First operand 1921 states and 2725 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-07-20 22:36:29,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:29,965 INFO L93 Difference]: Finished difference Result 4043 states and 5687 transitions. [2022-07-20 22:36:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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 253 [2022-07-20 22:36:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:29,969 INFO L225 Difference]: With dead ends: 4043 [2022-07-20 22:36:29,969 INFO L226 Difference]: Without dead ends: 2132 [2022-07-20 22:36:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:29,972 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 82 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:29,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 280 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-20 22:36:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-20 22:36:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4114583333333333) internal successors, (2710), 1920 states have internal predecessors, (2710), 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) [2022-07-20 22:36:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2710 transitions. [2022-07-20 22:36:30,040 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2710 transitions. Word has length 253 [2022-07-20 22:36:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2710 transitions. [2022-07-20 22:36:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 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) [2022-07-20 22:36:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2710 transitions. [2022-07-20 22:36:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 22:36:30,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:30,044 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:30,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-20 22:36:30,045 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1192083348, now seen corresponding path program 1 times [2022-07-20 22:36:30,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:30,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362202843] [2022-07-20 22:36:30,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:30,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 22:36:30,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:30,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362202843] [2022-07-20 22:36:30,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362202843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:30,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:30,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:30,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553903858] [2022-07-20 22:36:30,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:30,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:30,248 INFO L87 Difference]: Start difference. First operand 1921 states and 2710 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2022-07-20 22:36:32,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:32,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:32,517 INFO L93 Difference]: Finished difference Result 4043 states and 5657 transitions. [2022-07-20 22:36:32,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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 260 [2022-07-20 22:36:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:32,520 INFO L225 Difference]: With dead ends: 4043 [2022-07-20 22:36:32,521 INFO L226 Difference]: Without dead ends: 2132 [2022-07-20 22:36:32,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:32,523 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 76 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:32,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 282 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2022-07-20 22:36:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 1921. [2022-07-20 22:36:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4088541666666667) internal successors, (2705), 1920 states have internal predecessors, (2705), 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) [2022-07-20 22:36:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2705 transitions. [2022-07-20 22:36:32,601 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2705 transitions. Word has length 260 [2022-07-20 22:36:32,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:32,601 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2705 transitions. [2022-07-20 22:36:32,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2022-07-20 22:36:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2705 transitions. [2022-07-20 22:36:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-20 22:36:32,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:32,605 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-20 22:36:32,606 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1761922153, now seen corresponding path program 1 times [2022-07-20 22:36:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:32,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860875144] [2022-07-20 22:36:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:32,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:32,798 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2022-07-20 22:36:32,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:32,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860875144] [2022-07-20 22:36:32,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860875144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:32,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:32,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:32,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844533053] [2022-07-20 22:36:32,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:32,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:32,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:32,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:32,801 INFO L87 Difference]: Start difference. First operand 1921 states and 2705 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2022-07-20 22:36:34,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:36,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:37,040 INFO L93 Difference]: Finished difference Result 3883 states and 5457 transitions. [2022-07-20 22:36:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:37,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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 261 [2022-07-20 22:36:37,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:37,046 INFO L225 Difference]: With dead ends: 3883 [2022-07-20 22:36:37,046 INFO L226 Difference]: Without dead ends: 1972 [2022-07-20 22:36:37,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:37,049 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 27 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:37,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 458 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:36:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2022-07-20 22:36:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1921. [2022-07-20 22:36:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.4067708333333333) internal successors, (2701), 1920 states have internal predecessors, (2701), 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) [2022-07-20 22:36:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2701 transitions. [2022-07-20 22:36:37,119 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2701 transitions. Word has length 261 [2022-07-20 22:36:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:37,120 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2701 transitions. [2022-07-20 22:36:37,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 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) [2022-07-20 22:36:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2701 transitions. [2022-07-20 22:36:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-07-20 22:36:37,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:37,124 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 7, 7, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:37,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-20 22:36:37,125 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:37,125 INFO L85 PathProgramCache]: Analyzing trace with hash -167396823, now seen corresponding path program 1 times [2022-07-20 22:36:37,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:37,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146442904] [2022-07-20 22:36:37,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:37,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 587 proven. 1 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-07-20 22:36:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146442904] [2022-07-20 22:36:37,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146442904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:36:37,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847294255] [2022-07-20 22:36:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:37,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:36:37,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:36:37,360 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) [2022-07-20 22:36:37,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:36:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 22:36:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:36:38,851 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-20 22:36:38,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-20 22:36:38,856 INFO L390 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 123 treesize of output 63 [2022-07-20 22:36:38,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:36:38,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-20 22:36:39,076 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 22:36:39,076 INFO L390 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 19 treesize of output 7 [2022-07-20 22:36:39,091 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-20 22:36:39,091 INFO L390 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-20 22:36:39,120 INFO L390 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 [2022-07-20 22:36:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 549 proven. 40 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-07-20 22:36:39,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:36:39,181 INFO L390 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 10 treesize of output 4 [2022-07-20 22:36:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 555 proven. 24 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-20 22:36:39,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847294255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:36:39,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:36:39,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 13 [2022-07-20 22:36:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814807903] [2022-07-20 22:36:39,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:36:39,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 22:36:39,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 22:36:39,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:36:39,228 INFO L87 Difference]: Start difference. First operand 1921 states and 2701 transitions. Second operand has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 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) [2022-07-20 22:36:41,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:43,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:45,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:47,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:49,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:51,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:53,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:54,927 INFO L93 Difference]: Finished difference Result 5729 states and 7979 transitions. [2022-07-20 22:36:54,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 22:36:54,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 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 278 [2022-07-20 22:36:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:54,933 INFO L225 Difference]: With dead ends: 5729 [2022-07-20 22:36:54,933 INFO L226 Difference]: Without dead ends: 3818 [2022-07-20 22:36:54,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2022-07-20 22:36:54,936 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 736 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 232 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:54,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1613 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1472 Invalid, 7 Unknown, 0 Unchecked, 15.4s Time] [2022-07-20 22:36:54,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2022-07-20 22:36:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 3011. [2022-07-20 22:36:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 1.36843853820598) internal successors, (4119), 3010 states have internal predecessors, (4119), 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) [2022-07-20 22:36:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4119 transitions. [2022-07-20 22:36:55,024 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4119 transitions. Word has length 278 [2022-07-20 22:36:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:55,025 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 4119 transitions. [2022-07-20 22:36:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 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) [2022-07-20 22:36:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4119 transitions. [2022-07-20 22:36:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-20 22:36:55,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:55,030 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 8, 7, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:55,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:36:55,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:36:55,243 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:55,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash 602537677, now seen corresponding path program 1 times [2022-07-20 22:36:55,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:55,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931422369] [2022-07-20 22:36:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:55,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-07-20 22:36:55,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931422369] [2022-07-20 22:36:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931422369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:55,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232714871] [2022-07-20 22:36:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:55,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:55,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:55,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:55,458 INFO L87 Difference]: Start difference. First operand 3011 states and 4119 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2022-07-20 22:36:57,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:36:57,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:36:57,746 INFO L93 Difference]: Finished difference Result 6199 states and 8445 transitions. [2022-07-20 22:36:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:36:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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 280 [2022-07-20 22:36:57,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:36:57,749 INFO L225 Difference]: With dead ends: 6199 [2022-07-20 22:36:57,749 INFO L226 Difference]: Without dead ends: 3198 [2022-07-20 22:36:57,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:36:57,752 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 96 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:36:57,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 280 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:36:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-07-20 22:36:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3011. [2022-07-20 22:36:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 3010 states have (on average 1.3475083056478405) internal successors, (4056), 3010 states have internal predecessors, (4056), 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) [2022-07-20 22:36:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4056 transitions. [2022-07-20 22:36:57,806 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4056 transitions. Word has length 280 [2022-07-20 22:36:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:36:57,806 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 4056 transitions. [2022-07-20 22:36:57,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 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) [2022-07-20 22:36:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4056 transitions. [2022-07-20 22:36:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-07-20 22:36:57,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:36:57,809 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:36:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-07-20 22:36:57,809 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:36:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:36:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1181933716, now seen corresponding path program 1 times [2022-07-20 22:36:57,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:36:57,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750262588] [2022-07-20 22:36:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:36:57,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:36:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:36:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 620 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-07-20 22:36:58,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:36:58,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750262588] [2022-07-20 22:36:58,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750262588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:36:58,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:36:58,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:36:58,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945210753] [2022-07-20 22:36:58,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:36:58,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:36:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:36:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:36:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:36:58,025 INFO L87 Difference]: Start difference. First operand 3011 states and 4056 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2022-07-20 22:37:00,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:02,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:02,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:02,267 INFO L93 Difference]: Finished difference Result 6309 states and 8474 transitions. [2022-07-20 22:37:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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 283 [2022-07-20 22:37:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:02,270 INFO L225 Difference]: With dead ends: 6309 [2022-07-20 22:37:02,270 INFO L226 Difference]: Without dead ends: 3308 [2022-07-20 22:37:02,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:37:02,273 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:02,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 450 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-20 22:37:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-07-20 22:37:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3245. [2022-07-20 22:37:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3244 states have (on average 1.339087546239211) internal successors, (4344), 3244 states have internal predecessors, (4344), 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) [2022-07-20 22:37:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4344 transitions. [2022-07-20 22:37:02,366 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4344 transitions. Word has length 283 [2022-07-20 22:37:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:02,366 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 4344 transitions. [2022-07-20 22:37:02,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2022-07-20 22:37:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4344 transitions. [2022-07-20 22:37:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-07-20 22:37:02,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:02,370 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:02,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-20 22:37:02,370 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:02,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1021285984, now seen corresponding path program 1 times [2022-07-20 22:37:02,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:02,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370874267] [2022-07-20 22:37:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 637 proven. 0 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-07-20 22:37:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:02,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370874267] [2022-07-20 22:37:02,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370874267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:37:02,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:37:02,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:37:02,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87802739] [2022-07-20 22:37:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:37:02,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:37:02,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:37:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:37:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:37:02,577 INFO L87 Difference]: Start difference. First operand 3245 states and 4344 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2022-07-20 22:37:04,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-20 22:37:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:37:04,918 INFO L93 Difference]: Finished difference Result 6639 states and 8864 transitions. [2022-07-20 22:37:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:37:04,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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 298 [2022-07-20 22:37:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:37:04,922 INFO L225 Difference]: With dead ends: 6639 [2022-07-20 22:37:04,922 INFO L226 Difference]: Without dead ends: 3404 [2022-07-20 22:37:04,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:37:04,925 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 96 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:37:04,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 284 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 22:37:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2022-07-20 22:37:04,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2051. [2022-07-20 22:37:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.3385365853658537) internal successors, (2744), 2050 states have internal predecessors, (2744), 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) [2022-07-20 22:37:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 2744 transitions. [2022-07-20 22:37:04,969 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 2744 transitions. Word has length 298 [2022-07-20 22:37:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:37:04,969 INFO L495 AbstractCegarLoop]: Abstraction has 2051 states and 2744 transitions. [2022-07-20 22:37:04,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 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) [2022-07-20 22:37:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 2744 transitions. [2022-07-20 22:37:04,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-07-20 22:37:04,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:37:04,972 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:37:04,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-07-20 22:37:04,973 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:37:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:37:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1651619095, now seen corresponding path program 1 times [2022-07-20 22:37:04,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:37:04,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963507051] [2022-07-20 22:37:04,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:04,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:37:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 546 proven. 238 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-07-20 22:37:07,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:37:07,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963507051] [2022-07-20 22:37:07,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963507051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:37:07,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555323103] [2022-07-20 22:37:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:37:07,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:37:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:37:07,588 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) [2022-07-20 22:37:07,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:37:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:37:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 2063 conjuncts, 189 conjunts are in the unsatisfiable core [2022-07-20 22:37:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:37:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver