./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_srvr.blast.13.i.cil-1.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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:54:22,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:54:22,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:54:22,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:54:22,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:54:22,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:54:22,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:54:22,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:54:22,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:54:22,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:54:22,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:54:22,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:54:22,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:54:22,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:54:22,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:54:22,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:54:22,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:54:22,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:54:22,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:54:22,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:54:22,524 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:54:22,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:54:22,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:54:22,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:54:22,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:54:22,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:54:22,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:54:22,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:54:22,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:54:22,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:54:22,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:54:22,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:54:22,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:54:22,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:54:22,538 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:54:22,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:54:22,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:54:22,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:54:22,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:54:22,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:54:22,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:54:22,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:54:22,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:54:22,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:54:22,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:54:22,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:54:22,568 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:54:22,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:54:22,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:54:22,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:54:22,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:54:22,569 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:54:22,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:54:22,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:54:22,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:54:22,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:54:22,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:54:22,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:54:22,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:54:22,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:54:22,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:54:22,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:54:22,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:54:22,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:54:22,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:54:22,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:54:22,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:54:22,574 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:54:22,574 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:54:22,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:54:22,574 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2022-07-11 23:54:22,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:54:22,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:54:22,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:54:22,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:54:22,777 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:54:22,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2022-07-11 23:54:22,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17df0b1d7/0043903691f645c0976e9012de01a66b/FLAG2fba0906b [2022-07-11 23:54:23,271 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:54:23,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2022-07-11 23:54:23,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17df0b1d7/0043903691f645c0976e9012de01a66b/FLAG2fba0906b [2022-07-11 23:54:23,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17df0b1d7/0043903691f645c0976e9012de01a66b [2022-07-11 23:54:23,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:54:23,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:54:23,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:54:23,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:54:23,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:54:23,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:54:23" (1/1) ... [2022-07-11 23:54:23,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ea1593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:23, skipping insertion in model container [2022-07-11 23:54:23,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:54:23" (1/1) ... [2022-07-11 23:54:23,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:54:23,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:54:23,965 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_srvr.blast.13.i.cil-1.c[74354,74367] [2022-07-11 23:54:23,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:54:23,980 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:54:24,051 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_srvr.blast.13.i.cil-1.c[74354,74367] [2022-07-11 23:54:24,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:54:24,063 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:54:24,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24 WrapperNode [2022-07-11 23:54:24,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:54:24,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:54:24,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:54:24,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:54:24,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,136 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2022-07-11 23:54:24,137 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:54:24,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:54:24,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:54:24,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:54:24,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:54:24,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:54:24,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:54:24,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:54:24,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (1/1) ... [2022-07-11 23:54:24,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:54:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:54:24,256 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) [2022-07-11 23:54:24,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:54:24,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:54:24,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:54:24,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:54:24,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:54:24,422 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:54:24,423 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:54:24,435 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:54:25,964 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2022-07-11 23:54:25,964 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2022-07-11 23:54:25,964 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:54:25,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:54:25,969 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:54:25,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:54:25 BoogieIcfgContainer [2022-07-11 23:54:25,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:54:25,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:54:25,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:54:25,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:54:25,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:54:23" (1/3) ... [2022-07-11 23:54:25,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310d6057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:54:25, skipping insertion in model container [2022-07-11 23:54:25,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:54:24" (2/3) ... [2022-07-11 23:54:25,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@310d6057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:54:25, skipping insertion in model container [2022-07-11 23:54:25,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:54:25" (3/3) ... [2022-07-11 23:54:25,976 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2022-07-11 23:54:25,985 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:54:25,985 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:54:26,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:54:26,020 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@621801a2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@83bf6ee [2022-07-11 23:54:26,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:54:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 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) [2022-07-11 23:54:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-11 23:54:26,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:26,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:26,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2022-07-11 23:54:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:26,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697828447] [2022-07-11 23:54:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:26,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:26,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697828447] [2022-07-11 23:54:26,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697828447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:26,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:26,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:26,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203416473] [2022-07-11 23:54:26,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:26,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:26,418 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2022-07-11 23:54:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:26,995 INFO L93 Difference]: Finished difference Result 421 states and 717 transitions. [2022-07-11 23:54:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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 37 [2022-07-11 23:54:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:27,004 INFO L225 Difference]: With dead ends: 421 [2022-07-11 23:54:27,004 INFO L226 Difference]: Without dead ends: 256 [2022-07-11 23:54:27,006 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 [2022-07-11 23:54:27,008 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 169 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:27,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 439 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-11 23:54:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 165. [2022-07-11 23:54:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.5853658536585367) internal successors, (260), 164 states have internal predecessors, (260), 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) [2022-07-11 23:54:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 260 transitions. [2022-07-11 23:54:27,037 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 260 transitions. Word has length 37 [2022-07-11 23:54:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:27,038 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 260 transitions. [2022-07-11 23:54:27,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 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) [2022-07-11 23:54:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 260 transitions. [2022-07-11 23:54:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:54:27,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:27,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:27,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:54:27,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:27,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1559591931, now seen corresponding path program 1 times [2022-07-11 23:54:27,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:27,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010204341] [2022-07-11 23:54:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:27,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:27,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:27,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010204341] [2022-07-11 23:54:27,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010204341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:27,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:27,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:27,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323659594] [2022-07-11 23:54:27,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:27,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:27,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:27,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:27,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:27,175 INFO L87 Difference]: Start difference. First operand 165 states and 260 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:54:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:27,675 INFO L93 Difference]: Finished difference Result 439 states and 692 transitions. [2022-07-11 23:54:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:27,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 [2022-07-11 23:54:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:27,677 INFO L225 Difference]: With dead ends: 439 [2022-07-11 23:54:27,677 INFO L226 Difference]: Without dead ends: 284 [2022-07-11 23:54:27,678 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 [2022-07-11 23:54:27,678 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 134 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:27,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-11 23:54:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2022-07-11 23:54:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.616580310880829) internal successors, (312), 193 states have internal predecessors, (312), 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) [2022-07-11 23:54:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 312 transitions. [2022-07-11 23:54:27,694 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 312 transitions. Word has length 38 [2022-07-11 23:54:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:27,694 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 312 transitions. [2022-07-11 23:54:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2022-07-11 23:54:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 312 transitions. [2022-07-11 23:54:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:54:27,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:27,699 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:54:27,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1692183670, now seen corresponding path program 1 times [2022-07-11 23:54:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:27,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990374673] [2022-07-11 23:54:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:27,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:27,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990374673] [2022-07-11 23:54:27,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990374673] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:27,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:27,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195034409] [2022-07-11 23:54:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:27,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:27,854 INFO L87 Difference]: Start difference. First operand 194 states and 312 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2022-07-11 23:54:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:28,224 INFO L93 Difference]: Finished difference Result 406 states and 651 transitions. [2022-07-11 23:54:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:28,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 43 [2022-07-11 23:54:28,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:28,226 INFO L225 Difference]: With dead ends: 406 [2022-07-11 23:54:28,226 INFO L226 Difference]: Without dead ends: 222 [2022-07-11 23:54:28,227 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 [2022-07-11 23:54:28,228 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 22 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:28,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 469 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-11 23:54:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2022-07-11 23:54:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6225490196078431) internal successors, (331), 204 states have internal predecessors, (331), 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) [2022-07-11 23:54:28,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 331 transitions. [2022-07-11 23:54:28,237 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 331 transitions. Word has length 43 [2022-07-11 23:54:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:28,237 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 331 transitions. [2022-07-11 23:54:28,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2022-07-11 23:54:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 331 transitions. [2022-07-11 23:54:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 23:54:28,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:28,239 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:28,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:54:28,239 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1829148865, now seen corresponding path program 1 times [2022-07-11 23:54:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338874637] [2022-07-11 23:54:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:28,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338874637] [2022-07-11 23:54:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338874637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:28,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:28,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:28,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829293381] [2022-07-11 23:54:28,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:28,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:28,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:28,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:28,372 INFO L87 Difference]: Start difference. First operand 205 states and 331 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2022-07-11 23:54:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:28,721 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2022-07-11 23:54:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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 56 [2022-07-11 23:54:28,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:28,722 INFO L225 Difference]: With dead ends: 406 [2022-07-11 23:54:28,723 INFO L226 Difference]: Without dead ends: 222 [2022-07-11 23:54:28,723 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 [2022-07-11 23:54:28,724 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:28,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:54:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-11 23:54:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 205. [2022-07-11 23:54:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6176470588235294) internal successors, (330), 204 states have internal predecessors, (330), 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) [2022-07-11 23:54:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 330 transitions. [2022-07-11 23:54:28,730 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 330 transitions. Word has length 56 [2022-07-11 23:54:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:28,730 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 330 transitions. [2022-07-11 23:54:28,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 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) [2022-07-11 23:54:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 330 transitions. [2022-07-11 23:54:28,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:54:28,732 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:28,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:28,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:54:28,732 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:28,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1641822446, now seen corresponding path program 1 times [2022-07-11 23:54:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:28,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124159958] [2022-07-11 23:54:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:28,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:28,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124159958] [2022-07-11 23:54:28,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124159958] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:28,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:28,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:28,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866808329] [2022-07-11 23:54:28,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:28,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:28,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:28,799 INFO L87 Difference]: Start difference. First operand 205 states and 330 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:29,174 INFO L93 Difference]: Finished difference Result 405 states and 648 transitions. [2022-07-11 23:54:29,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-07-11 23:54:29,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:29,176 INFO L225 Difference]: With dead ends: 405 [2022-07-11 23:54:29,176 INFO L226 Difference]: Without dead ends: 221 [2022-07-11 23:54:29,176 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 [2022-07-11 23:54:29,176 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:29,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-11 23:54:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 205. [2022-07-11 23:54:29,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.6127450980392157) internal successors, (329), 204 states have internal predecessors, (329), 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) [2022-07-11 23:54:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 329 transitions. [2022-07-11 23:54:29,181 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 329 transitions. Word has length 57 [2022-07-11 23:54:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:29,182 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 329 transitions. [2022-07-11 23:54:29,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 329 transitions. [2022-07-11 23:54:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:54:29,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:29,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:29,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:54:29,183 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1649522854, now seen corresponding path program 1 times [2022-07-11 23:54:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331892991] [2022-07-11 23:54:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:29,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:29,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331892991] [2022-07-11 23:54:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331892991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:29,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:29,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:29,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240036897] [2022-07-11 23:54:29,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:29,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:29,250 INFO L87 Difference]: Start difference. First operand 205 states and 329 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:29,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:29,784 INFO L93 Difference]: Finished difference Result 479 states and 760 transitions. [2022-07-11 23:54:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-07-11 23:54:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:29,786 INFO L225 Difference]: With dead ends: 479 [2022-07-11 23:54:29,786 INFO L226 Difference]: Without dead ends: 295 [2022-07-11 23:54:29,786 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 [2022-07-11 23:54:29,787 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 150 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:29,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 330 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-07-11 23:54:29,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 205. [2022-07-11 23:54:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5980392156862746) internal successors, (326), 204 states have internal predecessors, (326), 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) [2022-07-11 23:54:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 326 transitions. [2022-07-11 23:54:29,791 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 326 transitions. Word has length 57 [2022-07-11 23:54:29,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:29,791 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 326 transitions. [2022-07-11 23:54:29,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:29,791 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 326 transitions. [2022-07-11 23:54:29,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:54:29,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:29,792 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:54:29,792 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:29,793 INFO L85 PathProgramCache]: Analyzing trace with hash 781598013, now seen corresponding path program 1 times [2022-07-11 23:54:29,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:29,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964842438] [2022-07-11 23:54:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:29,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:29,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964842438] [2022-07-11 23:54:29,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964842438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:29,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:29,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923711807] [2022-07-11 23:54:29,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:29,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:29,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:29,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:29,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:29,864 INFO L87 Difference]: Start difference. First operand 205 states and 326 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:30,336 INFO L93 Difference]: Finished difference Result 478 states and 754 transitions. [2022-07-11 23:54:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:30,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-07-11 23:54:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:30,337 INFO L225 Difference]: With dead ends: 478 [2022-07-11 23:54:30,338 INFO L226 Difference]: Without dead ends: 294 [2022-07-11 23:54:30,338 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 [2022-07-11 23:54:30,338 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:30,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-11 23:54:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2022-07-11 23:54:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5833333333333333) internal successors, (323), 204 states have internal predecessors, (323), 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) [2022-07-11 23:54:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions. [2022-07-11 23:54:30,343 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 57 [2022-07-11 23:54:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:30,343 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 323 transitions. [2022-07-11 23:54:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions. [2022-07-11 23:54:30,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:54:30,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:30,343 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:30,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:54:30,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1516942845, now seen corresponding path program 1 times [2022-07-11 23:54:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949852029] [2022-07-11 23:54:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:30,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:30,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:30,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949852029] [2022-07-11 23:54:30,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949852029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:30,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:30,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:30,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685075770] [2022-07-11 23:54:30,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:30,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:30,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:30,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:30,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:30,411 INFO L87 Difference]: Start difference. First operand 205 states and 323 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:31,087 INFO L93 Difference]: Finished difference Result 478 states and 749 transitions. [2022-07-11 23:54:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 57 [2022-07-11 23:54:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:31,088 INFO L225 Difference]: With dead ends: 478 [2022-07-11 23:54:31,088 INFO L226 Difference]: Without dead ends: 294 [2022-07-11 23:54:31,089 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 [2022-07-11 23:54:31,089 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:31,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-11 23:54:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2022-07-11 23:54:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5686274509803921) internal successors, (320), 204 states have internal predecessors, (320), 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) [2022-07-11 23:54:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 320 transitions. [2022-07-11 23:54:31,094 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 320 transitions. Word has length 57 [2022-07-11 23:54:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:31,094 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 320 transitions. [2022-07-11 23:54:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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) [2022-07-11 23:54:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 320 transitions. [2022-07-11 23:54:31,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:54:31,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:31,095 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:31,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:54:31,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:31,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:31,096 INFO L85 PathProgramCache]: Analyzing trace with hash -193910358, now seen corresponding path program 1 times [2022-07-11 23:54:31,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:31,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98289968] [2022-07-11 23:54:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:31,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:31,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98289968] [2022-07-11 23:54:31,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98289968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:31,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:31,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210987066] [2022-07-11 23:54:31,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:31,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:31,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:31,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:31,159 INFO L87 Difference]: Start difference. First operand 205 states and 320 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-07-11 23:54:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:31,588 INFO L93 Difference]: Finished difference Result 478 states and 744 transitions. [2022-07-11 23:54:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 58 [2022-07-11 23:54:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:31,590 INFO L225 Difference]: With dead ends: 478 [2022-07-11 23:54:31,590 INFO L226 Difference]: Without dead ends: 294 [2022-07-11 23:54:31,591 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 [2022-07-11 23:54:31,591 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:31,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:31,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-11 23:54:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2022-07-11 23:54:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.553921568627451) internal successors, (317), 204 states have internal predecessors, (317), 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) [2022-07-11 23:54:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 317 transitions. [2022-07-11 23:54:31,595 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 317 transitions. Word has length 58 [2022-07-11 23:54:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:31,595 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 317 transitions. [2022-07-11 23:54:31,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2022-07-11 23:54:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 317 transitions. [2022-07-11 23:54:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:54:31,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:31,596 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:31,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:54:31,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1419532885, now seen corresponding path program 1 times [2022-07-11 23:54:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216941421] [2022-07-11 23:54:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:31,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:31,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216941421] [2022-07-11 23:54:31,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216941421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:31,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:31,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:31,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775072055] [2022-07-11 23:54:31,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:31,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:31,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:31,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:31,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:31,668 INFO L87 Difference]: Start difference. First operand 205 states and 317 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) [2022-07-11 23:54:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:32,080 INFO L93 Difference]: Finished difference Result 402 states and 624 transitions. [2022-07-11 23:54:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:32,081 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 59 [2022-07-11 23:54:32,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:32,082 INFO L225 Difference]: With dead ends: 402 [2022-07-11 23:54:32,082 INFO L226 Difference]: Without dead ends: 218 [2022-07-11 23:54:32,082 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 [2022-07-11 23:54:32,082 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 20 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:32,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 479 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-07-11 23:54:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-07-11 23:54:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5490196078431373) internal successors, (316), 204 states have internal predecessors, (316), 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) [2022-07-11 23:54:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 316 transitions. [2022-07-11 23:54:32,086 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 316 transitions. Word has length 59 [2022-07-11 23:54:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:32,086 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 316 transitions. [2022-07-11 23:54:32,086 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) [2022-07-11 23:54:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 316 transitions. [2022-07-11 23:54:32,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:54:32,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:32,087 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:32,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:54:32,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:32,087 INFO L85 PathProgramCache]: Analyzing trace with hash -672893361, now seen corresponding path program 1 times [2022-07-11 23:54:32,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:32,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418938163] [2022-07-11 23:54:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:32,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:32,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:32,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418938163] [2022-07-11 23:54:32,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418938163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:32,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:32,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:32,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237459151] [2022-07-11 23:54:32,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:32,152 INFO L87 Difference]: Start difference. First operand 205 states and 316 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) [2022-07-11 23:54:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:32,595 INFO L93 Difference]: Finished difference Result 478 states and 738 transitions. [2022-07-11 23:54:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:32,596 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 60 [2022-07-11 23:54:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:32,597 INFO L225 Difference]: With dead ends: 478 [2022-07-11 23:54:32,597 INFO L226 Difference]: Without dead ends: 294 [2022-07-11 23:54:32,597 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 [2022-07-11 23:54:32,597 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 143 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:32,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-11 23:54:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 205. [2022-07-11 23:54:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.5343137254901962) internal successors, (313), 204 states have internal predecessors, (313), 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) [2022-07-11 23:54:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 313 transitions. [2022-07-11 23:54:32,601 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 313 transitions. Word has length 60 [2022-07-11 23:54:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:32,602 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 313 transitions. [2022-07-11 23:54:32,602 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) [2022-07-11 23:54:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 313 transitions. [2022-07-11 23:54:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:54:32,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:32,603 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:32,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:54:32,603 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 457194935, now seen corresponding path program 1 times [2022-07-11 23:54:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:32,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068119390] [2022-07-11 23:54:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:32,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:32,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068119390] [2022-07-11 23:54:32,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068119390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:32,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013128974] [2022-07-11 23:54:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:32,675 INFO L87 Difference]: Start difference. First operand 205 states and 313 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) [2022-07-11 23:54:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:33,678 INFO L93 Difference]: Finished difference Result 508 states and 780 transitions. [2022-07-11 23:54:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:33,678 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 60 [2022-07-11 23:54:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:33,680 INFO L225 Difference]: With dead ends: 508 [2022-07-11 23:54:33,680 INFO L226 Difference]: Without dead ends: 324 [2022-07-11 23:54:33,680 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 [2022-07-11 23:54:33,680 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 119 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:33,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:54:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-07-11 23:54:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 245. [2022-07-11 23:54:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.5532786885245902) internal successors, (379), 244 states have internal predecessors, (379), 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) [2022-07-11 23:54:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 379 transitions. [2022-07-11 23:54:33,686 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 379 transitions. Word has length 60 [2022-07-11 23:54:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:33,687 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 379 transitions. [2022-07-11 23:54:33,687 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) [2022-07-11 23:54:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 379 transitions. [2022-07-11 23:54:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-11 23:54:33,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:33,688 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-11 23:54:33,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:54:33,688 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1280776532, now seen corresponding path program 1 times [2022-07-11 23:54:33,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271928698] [2022-07-11 23:54:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:33,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:33,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271928698] [2022-07-11 23:54:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271928698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:33,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:33,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:33,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706567555] [2022-07-11 23:54:33,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:33,789 INFO L87 Difference]: Start difference. First operand 245 states and 379 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-07-11 23:54:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:34,324 INFO L93 Difference]: Finished difference Result 511 states and 793 transitions. [2022-07-11 23:54:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:34,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 61 [2022-07-11 23:54:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:34,326 INFO L225 Difference]: With dead ends: 511 [2022-07-11 23:54:34,326 INFO L226 Difference]: Without dead ends: 287 [2022-07-11 23:54:34,326 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 [2022-07-11 23:54:34,327 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 29 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:34,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 493 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-11 23:54:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 267. [2022-07-11 23:54:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 266 states have internal predecessors, (412), 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) [2022-07-11 23:54:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 412 transitions. [2022-07-11 23:54:34,331 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 412 transitions. Word has length 61 [2022-07-11 23:54:34,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:34,332 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 412 transitions. [2022-07-11 23:54:34,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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) [2022-07-11 23:54:34,333 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 412 transitions. [2022-07-11 23:54:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-11 23:54:34,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:34,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-11 23:54:34,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:54:34,334 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:34,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1738282229, now seen corresponding path program 1 times [2022-07-11 23:54:34,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:34,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077560754] [2022-07-11 23:54:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:34,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077560754] [2022-07-11 23:54:34,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077560754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:34,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:34,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97657371] [2022-07-11 23:54:34,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:34,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:34,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:34,423 INFO L87 Difference]: Start difference. First operand 267 states and 412 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2022-07-11 23:54:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:34,804 INFO L93 Difference]: Finished difference Result 531 states and 823 transitions. [2022-07-11 23:54:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:34,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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 74 [2022-07-11 23:54:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:34,806 INFO L225 Difference]: With dead ends: 531 [2022-07-11 23:54:34,806 INFO L226 Difference]: Without dead ends: 285 [2022-07-11 23:54:34,806 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 [2022-07-11 23:54:34,806 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 34 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:34,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:34,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-11 23:54:34,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 267. [2022-07-11 23:54:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5451127819548873) internal successors, (411), 266 states have internal predecessors, (411), 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) [2022-07-11 23:54:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 411 transitions. [2022-07-11 23:54:34,812 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 411 transitions. Word has length 74 [2022-07-11 23:54:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:34,812 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 411 transitions. [2022-07-11 23:54:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 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) [2022-07-11 23:54:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 411 transitions. [2022-07-11 23:54:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 23:54:34,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:34,813 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:34,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:54:34,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1641439224, now seen corresponding path program 1 times [2022-07-11 23:54:34,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:34,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086390898] [2022-07-11 23:54:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:34,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:34,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086390898] [2022-07-11 23:54:34,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086390898] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:34,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:34,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:34,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319344760] [2022-07-11 23:54:34,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:34,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:34,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:34,901 INFO L87 Difference]: Start difference. First operand 267 states and 411 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-07-11 23:54:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:35,565 INFO L93 Difference]: Finished difference Result 530 states and 820 transitions. [2022-07-11 23:54:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:35,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 75 [2022-07-11 23:54:35,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:35,566 INFO L225 Difference]: With dead ends: 530 [2022-07-11 23:54:35,566 INFO L226 Difference]: Without dead ends: 284 [2022-07-11 23:54:35,567 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 [2022-07-11 23:54:35,567 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 38 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:35,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-07-11 23:54:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 267. [2022-07-11 23:54:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5413533834586466) internal successors, (410), 266 states have internal predecessors, (410), 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) [2022-07-11 23:54:35,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 410 transitions. [2022-07-11 23:54:35,572 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 410 transitions. Word has length 75 [2022-07-11 23:54:35,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:35,573 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 410 transitions. [2022-07-11 23:54:35,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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) [2022-07-11 23:54:35,573 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 410 transitions. [2022-07-11 23:54:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-11 23:54:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:35,573 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:35,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:54:35,574 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:35,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -960780097, now seen corresponding path program 1 times [2022-07-11 23:54:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:35,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129498651] [2022-07-11 23:54:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:54:35,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129498651] [2022-07-11 23:54:35,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129498651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:35,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:35,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:35,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262693742] [2022-07-11 23:54:35,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:35,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:35,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:35,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:35,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:35,649 INFO L87 Difference]: Start difference. First operand 267 states and 410 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2022-07-11 23:54:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:36,324 INFO L93 Difference]: Finished difference Result 602 states and 927 transitions. [2022-07-11 23:54:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:36,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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 77 [2022-07-11 23:54:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:36,325 INFO L225 Difference]: With dead ends: 602 [2022-07-11 23:54:36,325 INFO L226 Difference]: Without dead ends: 356 [2022-07-11 23:54:36,326 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 [2022-07-11 23:54:36,326 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 144 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:36,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 334 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-07-11 23:54:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 267. [2022-07-11 23:54:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5263157894736843) internal successors, (406), 266 states have internal predecessors, (406), 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) [2022-07-11 23:54:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 406 transitions. [2022-07-11 23:54:36,332 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 406 transitions. Word has length 77 [2022-07-11 23:54:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:36,332 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 406 transitions. [2022-07-11 23:54:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2022-07-11 23:54:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 406 transitions. [2022-07-11 23:54:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:54:36,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:36,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-11 23:54:36,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:54:36,333 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:36,334 INFO L85 PathProgramCache]: Analyzing trace with hash 233723934, now seen corresponding path program 1 times [2022-07-11 23:54:36,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:36,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647130074] [2022-07-11 23:54:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:36,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:36,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647130074] [2022-07-11 23:54:36,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647130074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:36,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:36,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:36,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441327622] [2022-07-11 23:54:36,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:36,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:36,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:36,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:36,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:36,414 INFO L87 Difference]: Start difference. First operand 267 states and 406 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-11 23:54:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:37,516 INFO L93 Difference]: Finished difference Result 605 states and 922 transitions. [2022-07-11 23:54:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 83 [2022-07-11 23:54:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:37,518 INFO L225 Difference]: With dead ends: 605 [2022-07-11 23:54:37,518 INFO L226 Difference]: Without dead ends: 359 [2022-07-11 23:54:37,519 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 [2022-07-11 23:54:37,519 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 71 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:37,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:54:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-07-11 23:54:37,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 309. [2022-07-11 23:54:37,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5357142857142858) internal successors, (473), 308 states have internal predecessors, (473), 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) [2022-07-11 23:54:37,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 473 transitions. [2022-07-11 23:54:37,524 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 473 transitions. Word has length 83 [2022-07-11 23:54:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:37,525 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 473 transitions. [2022-07-11 23:54:37,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-11 23:54:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 473 transitions. [2022-07-11 23:54:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:54:37,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:37,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-11 23:54:37,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:54:37,526 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:37,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1138083364, now seen corresponding path program 1 times [2022-07-11 23:54:37,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:37,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302521978] [2022-07-11 23:54:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:37,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:37,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302521978] [2022-07-11 23:54:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302521978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:37,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:37,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:37,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848789243] [2022-07-11 23:54:37,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:37,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:37,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:37,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:37,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:37,613 INFO L87 Difference]: Start difference. First operand 309 states and 473 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-11 23:54:38,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:38,291 INFO L93 Difference]: Finished difference Result 646 states and 991 transitions. [2022-07-11 23:54:38,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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 83 [2022-07-11 23:54:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:38,296 INFO L225 Difference]: With dead ends: 646 [2022-07-11 23:54:38,296 INFO L226 Difference]: Without dead ends: 358 [2022-07-11 23:54:38,297 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 [2022-07-11 23:54:38,297 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 36 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:38,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 591 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:38,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-07-11 23:54:38,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2022-07-11 23:54:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.533132530120482) internal successors, (509), 332 states have internal predecessors, (509), 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) [2022-07-11 23:54:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 509 transitions. [2022-07-11 23:54:38,308 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 509 transitions. Word has length 83 [2022-07-11 23:54:38,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:38,308 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 509 transitions. [2022-07-11 23:54:38,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2022-07-11 23:54:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 509 transitions. [2022-07-11 23:54:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-11 23:54:38,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:38,309 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:38,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:54:38,309 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:38,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:38,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1409451137, now seen corresponding path program 1 times [2022-07-11 23:54:38,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:38,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013561992] [2022-07-11 23:54:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:38,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:38,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:38,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013561992] [2022-07-11 23:54:38,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013561992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:38,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:38,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:38,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916130218] [2022-07-11 23:54:38,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:38,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:38,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:38,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:38,418 INFO L87 Difference]: Start difference. First operand 333 states and 509 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-07-11 23:54:40,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:40,453 INFO L93 Difference]: Finished difference Result 771 states and 1187 transitions. [2022-07-11 23:54:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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 96 [2022-07-11 23:54:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:40,455 INFO L225 Difference]: With dead ends: 771 [2022-07-11 23:54:40,455 INFO L226 Difference]: Without dead ends: 459 [2022-07-11 23:54:40,456 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 [2022-07-11 23:54:40,456 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 141 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:40,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 354 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:54:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-07-11 23:54:40,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 349. [2022-07-11 23:54:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.514367816091954) internal successors, (527), 348 states have internal predecessors, (527), 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) [2022-07-11 23:54:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 527 transitions. [2022-07-11 23:54:40,462 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 527 transitions. Word has length 96 [2022-07-11 23:54:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:40,462 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 527 transitions. [2022-07-11 23:54:40,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 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) [2022-07-11 23:54:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 527 transitions. [2022-07-11 23:54:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-11 23:54:40,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:40,463 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:40,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:54:40,463 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 436925762, now seen corresponding path program 1 times [2022-07-11 23:54:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:40,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469435605] [2022-07-11 23:54:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:40,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:40,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469435605] [2022-07-11 23:54:40,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469435605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:40,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:40,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606431508] [2022-07-11 23:54:40,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:40,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:40,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:40,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:40,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:40,593 INFO L87 Difference]: Start difference. First operand 349 states and 527 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2022-07-11 23:54:41,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:41,029 INFO L93 Difference]: Finished difference Result 755 states and 1147 transitions. [2022-07-11 23:54:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:41,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 97 [2022-07-11 23:54:41,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:41,031 INFO L225 Difference]: With dead ends: 755 [2022-07-11 23:54:41,031 INFO L226 Difference]: Without dead ends: 427 [2022-07-11 23:54:41,031 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 [2022-07-11 23:54:41,032 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 139 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:41,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 356 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:41,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-07-11 23:54:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 349. [2022-07-11 23:54:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4971264367816093) internal successors, (521), 348 states have internal predecessors, (521), 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) [2022-07-11 23:54:41,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 521 transitions. [2022-07-11 23:54:41,037 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 521 transitions. Word has length 97 [2022-07-11 23:54:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:41,037 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 521 transitions. [2022-07-11 23:54:41,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2022-07-11 23:54:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 521 transitions. [2022-07-11 23:54:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-11 23:54:41,039 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:41,039 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:54:41,039 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash 280390343, now seen corresponding path program 1 times [2022-07-11 23:54:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:41,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642964941] [2022-07-11 23:54:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:41,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642964941] [2022-07-11 23:54:41,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642964941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:41,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:41,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:41,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611844137] [2022-07-11 23:54:41,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:41,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:41,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:41,120 INFO L87 Difference]: Start difference. First operand 349 states and 521 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-07-11 23:54:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:41,791 INFO L93 Difference]: Finished difference Result 714 states and 1068 transitions. [2022-07-11 23:54:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:41,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 104 [2022-07-11 23:54:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:41,793 INFO L225 Difference]: With dead ends: 714 [2022-07-11 23:54:41,793 INFO L226 Difference]: Without dead ends: 386 [2022-07-11 23:54:41,793 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 [2022-07-11 23:54:41,794 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 75 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:41,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 489 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 23:54:41,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-11 23:54:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2022-07-11 23:54:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4942528735632183) internal successors, (520), 348 states have internal predecessors, (520), 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) [2022-07-11 23:54:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 520 transitions. [2022-07-11 23:54:41,808 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 520 transitions. Word has length 104 [2022-07-11 23:54:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 520 transitions. [2022-07-11 23:54:41,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-07-11 23:54:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 520 transitions. [2022-07-11 23:54:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:41,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:41,809 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:54:41,810 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:41,810 INFO L85 PathProgramCache]: Analyzing trace with hash 318897402, now seen corresponding path program 1 times [2022-07-11 23:54:41,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:41,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103427322] [2022-07-11 23:54:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103427322] [2022-07-11 23:54:41,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103427322] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:41,886 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:41,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:41,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161144526] [2022-07-11 23:54:41,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:41,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:41,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:41,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:41,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:41,888 INFO L87 Difference]: Start difference. First operand 349 states and 520 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) [2022-07-11 23:54:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:42,427 INFO L93 Difference]: Finished difference Result 714 states and 1066 transitions. [2022-07-11 23:54:42,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:42,430 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 105 [2022-07-11 23:54:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:42,431 INFO L225 Difference]: With dead ends: 714 [2022-07-11 23:54:42,431 INFO L226 Difference]: Without dead ends: 386 [2022-07-11 23:54:42,431 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 [2022-07-11 23:54:42,432 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 76 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:42,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 503 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:54:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-07-11 23:54:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 349. [2022-07-11 23:54:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4913793103448276) internal successors, (519), 348 states have internal predecessors, (519), 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) [2022-07-11 23:54:42,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 519 transitions. [2022-07-11 23:54:42,437 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 519 transitions. Word has length 105 [2022-07-11 23:54:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:42,437 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 519 transitions. [2022-07-11 23:54:42,438 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) [2022-07-11 23:54:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 519 transitions. [2022-07-11 23:54:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:42,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:42,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:42,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:54:42,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 509759261, now seen corresponding path program 1 times [2022-07-11 23:54:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332781582] [2022-07-11 23:54:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:42,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:42,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332781582] [2022-07-11 23:54:42,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332781582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:42,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:42,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435060217] [2022-07-11 23:54:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:42,525 INFO L87 Difference]: Start difference. First operand 349 states and 519 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) [2022-07-11 23:54:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:43,090 INFO L93 Difference]: Finished difference Result 755 states and 1131 transitions. [2022-07-11 23:54:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:43,090 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 105 [2022-07-11 23:54:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:43,092 INFO L225 Difference]: With dead ends: 755 [2022-07-11 23:54:43,092 INFO L226 Difference]: Without dead ends: 427 [2022-07-11 23:54:43,092 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 [2022-07-11 23:54:43,093 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 122 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:43,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 392 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:54:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-07-11 23:54:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 349. [2022-07-11 23:54:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4798850574712643) internal successors, (515), 348 states have internal predecessors, (515), 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) [2022-07-11 23:54:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 515 transitions. [2022-07-11 23:54:43,098 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 515 transitions. Word has length 105 [2022-07-11 23:54:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:43,098 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 515 transitions. [2022-07-11 23:54:43,098 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) [2022-07-11 23:54:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 515 transitions. [2022-07-11 23:54:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:43,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:43,099 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-07-11 23:54:43,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:54:43,099 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:43,100 INFO L85 PathProgramCache]: Analyzing trace with hash -213108826, now seen corresponding path program 1 times [2022-07-11 23:54:43,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:43,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470298312] [2022-07-11 23:54:43,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:54:43,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:43,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470298312] [2022-07-11 23:54:43,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470298312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:43,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:43,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423928639] [2022-07-11 23:54:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:43,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:43,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:43,180 INFO L87 Difference]: Start difference. First operand 349 states and 515 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) [2022-07-11 23:54:44,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,025 INFO L93 Difference]: Finished difference Result 820 states and 1222 transitions. [2022-07-11 23:54:44,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:44,025 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 105 [2022-07-11 23:54:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,027 INFO L225 Difference]: With dead ends: 820 [2022-07-11 23:54:44,027 INFO L226 Difference]: Without dead ends: 492 [2022-07-11 23:54:44,027 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 [2022-07-11 23:54:44,028 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 115 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 366 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 23:54:44,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-07-11 23:54:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 413. [2022-07-11 23:54:44,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 1.4757281553398058) internal successors, (608), 412 states have internal predecessors, (608), 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) [2022-07-11 23:54:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 608 transitions. [2022-07-11 23:54:44,035 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 608 transitions. Word has length 105 [2022-07-11 23:54:44,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,035 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 608 transitions. [2022-07-11 23:54:44,035 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) [2022-07-11 23:54:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 608 transitions. [2022-07-11 23:54:44,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:44,036 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,036 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:44,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:54:44,036 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash 998169656, now seen corresponding path program 1 times [2022-07-11 23:54:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591655674] [2022-07-11 23:54:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 23:54:44,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591655674] [2022-07-11 23:54:44,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591655674] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801030969] [2022-07-11 23:54:44,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,130 INFO L87 Difference]: Start difference. First operand 413 states and 608 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2022-07-11 23:54:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,160 INFO L93 Difference]: Finished difference Result 1192 states and 1770 transitions. [2022-07-11 23:54:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 105 [2022-07-11 23:54:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,163 INFO L225 Difference]: With dead ends: 1192 [2022-07-11 23:54:44,163 INFO L226 Difference]: Without dead ends: 800 [2022-07-11 23:54:44,163 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 [2022-07-11 23:54:44,164 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 137 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 426 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-07-11 23:54:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2022-07-11 23:54:44,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.4730913642052565) internal successors, (1177), 799 states have internal predecessors, (1177), 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) [2022-07-11 23:54:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1177 transitions. [2022-07-11 23:54:44,175 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1177 transitions. Word has length 105 [2022-07-11 23:54:44,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,175 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1177 transitions. [2022-07-11 23:54:44,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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) [2022-07-11 23:54:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1177 transitions. [2022-07-11 23:54:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:44,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,177 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:54:44,177 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 943776758, now seen corresponding path program 1 times [2022-07-11 23:54:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253255922] [2022-07-11 23:54:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:54:44,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253255922] [2022-07-11 23:54:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253255922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853455537] [2022-07-11 23:54:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,239 INFO L87 Difference]: Start difference. First operand 800 states and 1177 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-11 23:54:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,262 INFO L93 Difference]: Finished difference Result 1606 states and 2366 transitions. [2022-07-11 23:54:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 105 [2022-07-11 23:54:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,264 INFO L225 Difference]: With dead ends: 1606 [2022-07-11 23:54:44,264 INFO L226 Difference]: Without dead ends: 827 [2022-07-11 23:54:44,265 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 [2022-07-11 23:54:44,265 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 410 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-11 23:54:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-11 23:54:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 1.4673123486682809) internal successors, (1212), 826 states have internal predecessors, (1212), 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) [2022-07-11 23:54:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1212 transitions. [2022-07-11 23:54:44,276 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1212 transitions. Word has length 105 [2022-07-11 23:54:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,277 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1212 transitions. [2022-07-11 23:54:44,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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) [2022-07-11 23:54:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1212 transitions. [2022-07-11 23:54:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-11 23:54:44,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,278 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:44,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-11 23:54:44,278 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -935354188, now seen corresponding path program 1 times [2022-07-11 23:54:44,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478619846] [2022-07-11 23:54:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-11 23:54:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478619846] [2022-07-11 23:54:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478619846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431382549] [2022-07-11 23:54:44,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,344 INFO L87 Difference]: Start difference. First operand 827 states and 1212 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-07-11 23:54:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,362 INFO L93 Difference]: Finished difference Result 1635 states and 2402 transitions. [2022-07-11 23:54:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 105 [2022-07-11 23:54:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,364 INFO L225 Difference]: With dead ends: 1635 [2022-07-11 23:54:44,364 INFO L226 Difference]: Without dead ends: 829 [2022-07-11 23:54:44,365 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 [2022-07-11 23:54:44,365 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 389 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-07-11 23:54:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 829. [2022-07-11 23:54:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 1.4661835748792271) internal successors, (1214), 828 states have internal predecessors, (1214), 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) [2022-07-11 23:54:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1214 transitions. [2022-07-11 23:54:44,379 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1214 transitions. Word has length 105 [2022-07-11 23:54:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,379 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1214 transitions. [2022-07-11 23:54:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2022-07-11 23:54:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1214 transitions. [2022-07-11 23:54:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-11 23:54:44,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:44,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:54:44,381 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1675942322, now seen corresponding path program 1 times [2022-07-11 23:54:44,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937229472] [2022-07-11 23:54:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,449 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:44,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937229472] [2022-07-11 23:54:44,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937229472] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413804438] [2022-07-11 23:54:44,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,451 INFO L87 Difference]: Start difference. First operand 829 states and 1214 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2022-07-11 23:54:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,485 INFO L93 Difference]: Finished difference Result 2027 states and 2984 transitions. [2022-07-11 23:54:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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 107 [2022-07-11 23:54:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,489 INFO L225 Difference]: With dead ends: 2027 [2022-07-11 23:54:44,489 INFO L226 Difference]: Without dead ends: 1221 [2022-07-11 23:54:44,490 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 [2022-07-11 23:54:44,490 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 149 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 569 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-07-11 23:54:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1219. [2022-07-11 23:54:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 1.4688013136288998) internal successors, (1789), 1218 states have internal predecessors, (1789), 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) [2022-07-11 23:54:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1789 transitions. [2022-07-11 23:54:44,508 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1789 transitions. Word has length 107 [2022-07-11 23:54:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,508 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 1789 transitions. [2022-07-11 23:54:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 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) [2022-07-11 23:54:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1789 transitions. [2022-07-11 23:54:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-11 23:54:44,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-11 23:54:44,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:54:44,510 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1041814139, now seen corresponding path program 1 times [2022-07-11 23:54:44,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027539113] [2022-07-11 23:54:44,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-11 23:54:44,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027539113] [2022-07-11 23:54:44,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027539113] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131907400] [2022-07-11 23:54:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,592 INFO L87 Difference]: Start difference. First operand 1219 states and 1789 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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) [2022-07-11 23:54:44,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,627 INFO L93 Difference]: Finished difference Result 2772 states and 4086 transitions. [2022-07-11 23:54:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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 124 [2022-07-11 23:54:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,631 INFO L225 Difference]: With dead ends: 2772 [2022-07-11 23:54:44,631 INFO L226 Difference]: Without dead ends: 1576 [2022-07-11 23:54:44,632 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 [2022-07-11 23:54:44,632 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 142 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 567 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-07-11 23:54:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1576. [2022-07-11 23:54:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.4692063492063492) internal successors, (2314), 1575 states have internal predecessors, (2314), 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) [2022-07-11 23:54:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2314 transitions. [2022-07-11 23:54:44,654 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2314 transitions. Word has length 124 [2022-07-11 23:54:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,655 INFO L495 AbstractCegarLoop]: Abstraction has 1576 states and 2314 transitions. [2022-07-11 23:54:44,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 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) [2022-07-11 23:54:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2314 transitions. [2022-07-11 23:54:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-11 23:54:44,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,657 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1] [2022-07-11 23:54:44,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:54:44,657 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,657 INFO L85 PathProgramCache]: Analyzing trace with hash 726227607, now seen corresponding path program 1 times [2022-07-11 23:54:44,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905617486] [2022-07-11 23:54:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-11 23:54:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905617486] [2022-07-11 23:54:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905617486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255937498] [2022-07-11 23:54:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,752 INFO L87 Difference]: Start difference. First operand 1576 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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) [2022-07-11 23:54:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,786 INFO L93 Difference]: Finished difference Result 2360 states and 3466 transitions. [2022-07-11 23:54:44,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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 128 [2022-07-11 23:54:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,791 INFO L225 Difference]: With dead ends: 2360 [2022-07-11 23:54:44,791 INFO L226 Difference]: Without dead ends: 1968 [2022-07-11 23:54:44,792 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 [2022-07-11 23:54:44,793 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 373 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2022-07-11 23:54:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1966. [2022-07-11 23:54:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 1.4681933842239185) internal successors, (2885), 1965 states have internal predecessors, (2885), 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) [2022-07-11 23:54:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2885 transitions. [2022-07-11 23:54:44,822 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2885 transitions. Word has length 128 [2022-07-11 23:54:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:44,822 INFO L495 AbstractCegarLoop]: Abstraction has 1966 states and 2885 transitions. [2022-07-11 23:54:44,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 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) [2022-07-11 23:54:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2885 transitions. [2022-07-11 23:54:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-11 23:54:44,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:44,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1] [2022-07-11 23:54:44,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:54:44,825 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1329906676, now seen corresponding path program 1 times [2022-07-11 23:54:44,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:44,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461403371] [2022-07-11 23:54:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-11 23:54:44,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:44,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461403371] [2022-07-11 23:54:44,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461403371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:44,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:44,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:44,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476909177] [2022-07-11 23:54:44,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:44,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:44,899 INFO L87 Difference]: Start difference. First operand 1966 states and 2885 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-11 23:54:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:44,963 INFO L93 Difference]: Finished difference Result 2360 states and 3462 transitions. [2022-07-11 23:54:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 129 [2022-07-11 23:54:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:44,968 INFO L225 Difference]: With dead ends: 2360 [2022-07-11 23:54:44,968 INFO L226 Difference]: Without dead ends: 2358 [2022-07-11 23:54:44,969 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 [2022-07-11 23:54:44,969 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 165 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:44,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 371 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-07-11 23:54:45,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2356. [2022-07-11 23:54:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 1.4687898089171973) internal successors, (3459), 2355 states have internal predecessors, (3459), 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) [2022-07-11 23:54:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 3459 transitions. [2022-07-11 23:54:45,007 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 3459 transitions. Word has length 129 [2022-07-11 23:54:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:45,007 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 3459 transitions. [2022-07-11 23:54:45,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-07-11 23:54:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 3459 transitions. [2022-07-11 23:54:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-11 23:54:45,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:45,011 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-07-11 23:54:45,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:54:45,011 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash -991027209, now seen corresponding path program 1 times [2022-07-11 23:54:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049389404] [2022-07-11 23:54:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:45,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:45,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049389404] [2022-07-11 23:54:45,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049389404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:45,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:45,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:54:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307120497] [2022-07-11 23:54:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:54:45,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:54:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:54:45,097 INFO L87 Difference]: Start difference. First operand 2356 states and 3459 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-07-11 23:54:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:45,158 INFO L93 Difference]: Finished difference Result 5045 states and 7422 transitions. [2022-07-11 23:54:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:54:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 166 [2022-07-11 23:54:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:45,165 INFO L225 Difference]: With dead ends: 5045 [2022-07-11 23:54:45,165 INFO L226 Difference]: Without dead ends: 2712 [2022-07-11 23:54:45,168 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 [2022-07-11 23:54:45,168 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 144 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:45,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 572 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:54:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2022-07-11 23:54:45,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2712. [2022-07-11 23:54:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.4688306897823682) internal successors, (3982), 2711 states have internal predecessors, (3982), 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) [2022-07-11 23:54:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3982 transitions. [2022-07-11 23:54:45,223 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3982 transitions. Word has length 166 [2022-07-11 23:54:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:45,224 INFO L495 AbstractCegarLoop]: Abstraction has 2712 states and 3982 transitions. [2022-07-11 23:54:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2022-07-11 23:54:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3982 transitions. [2022-07-11 23:54:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-11 23:54:45,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:45,228 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:54:45,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-11 23:54:45,228 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:45,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1009344134, now seen corresponding path program 1 times [2022-07-11 23:54:45,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:45,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493932201] [2022-07-11 23:54:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:45,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:45,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 253 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-11 23:54:45,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:45,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493932201] [2022-07-11 23:54:45,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493932201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:45,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:45,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:54:45,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213058606] [2022-07-11 23:54:45,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:45,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:54:45,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:54:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:54:45,314 INFO L87 Difference]: Start difference. First operand 2712 states and 3982 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) [2022-07-11 23:54:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:45,793 INFO L93 Difference]: Finished difference Result 5555 states and 8150 transitions. [2022-07-11 23:54:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:54:45,794 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 193 [2022-07-11 23:54:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:45,800 INFO L225 Difference]: With dead ends: 5555 [2022-07-11 23:54:45,800 INFO L226 Difference]: Without dead ends: 2866 [2022-07-11 23:54:45,803 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 [2022-07-11 23:54:45,803 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 40 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:45,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 562 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:54:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2022-07-11 23:54:45,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2712. [2022-07-11 23:54:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2711 states have (on average 1.466248616746588) internal successors, (3975), 2711 states have internal predecessors, (3975), 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) [2022-07-11 23:54:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 3975 transitions. [2022-07-11 23:54:45,851 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 3975 transitions. Word has length 193 [2022-07-11 23:54:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:45,851 INFO L495 AbstractCegarLoop]: Abstraction has 2712 states and 3975 transitions. [2022-07-11 23:54:45,851 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) [2022-07-11 23:54:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 3975 transitions. [2022-07-11 23:54:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-11 23:54:45,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:45,855 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:54:45,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:54:45,856 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 165425264, now seen corresponding path program 1 times [2022-07-11 23:54:45,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:45,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769476206] [2022-07-11 23:54:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:45,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:46,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769476206] [2022-07-11 23:54:46,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769476206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:46,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:46,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:54:46,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141619832] [2022-07-11 23:54:46,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:46,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:54:46,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:54:46,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:54:46,057 INFO L87 Difference]: Start difference. First operand 2712 states and 3975 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-07-11 23:54:47,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:50,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:50,069 INFO L93 Difference]: Finished difference Result 8665 states and 12591 transitions. [2022-07-11 23:54:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:54:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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 201 [2022-07-11 23:54:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:50,092 INFO L225 Difference]: With dead ends: 8665 [2022-07-11 23:54:50,092 INFO L226 Difference]: Without dead ends: 5976 [2022-07-11 23:54:50,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:54:50,095 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 683 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:50,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1202 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-11 23:54:50,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-07-11 23:54:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 3195. [2022-07-11 23:54:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 1.4724483406386975) internal successors, (4703), 3194 states have internal predecessors, (4703), 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) [2022-07-11 23:54:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 4703 transitions. [2022-07-11 23:54:50,173 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 4703 transitions. Word has length 201 [2022-07-11 23:54:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 3195 states and 4703 transitions. [2022-07-11 23:54:50,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-07-11 23:54:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 4703 transitions. [2022-07-11 23:54:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-11 23:54:50,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:50,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:54:50,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:54:50,178 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:50,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash -721797582, now seen corresponding path program 1 times [2022-07-11 23:54:50,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:50,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529366436] [2022-07-11 23:54:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:50,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529366436] [2022-07-11 23:54:50,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529366436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:50,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-11 23:54:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338776048] [2022-07-11 23:54:50,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:50,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-11 23:54:50,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:50,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-11 23:54:50,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:54:50,418 INFO L87 Difference]: Start difference. First operand 3195 states and 4703 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-07-11 23:54:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:54,122 INFO L93 Difference]: Finished difference Result 9476 states and 13761 transitions. [2022-07-11 23:54:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:54:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 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 201 [2022-07-11 23:54:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:54,132 INFO L225 Difference]: With dead ends: 9476 [2022-07-11 23:54:54,132 INFO L226 Difference]: Without dead ends: 6304 [2022-07-11 23:54:54,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:54:54,136 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 622 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 1897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:54,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1838 Invalid, 1897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-11 23:54:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2022-07-11 23:54:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 3440. [2022-07-11 23:54:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 1.4780459435882525) internal successors, (5083), 3439 states have internal predecessors, (5083), 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) [2022-07-11 23:54:54,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 5083 transitions. [2022-07-11 23:54:54,220 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 5083 transitions. Word has length 201 [2022-07-11 23:54:54,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:54,220 INFO L495 AbstractCegarLoop]: Abstraction has 3440 states and 5083 transitions. [2022-07-11 23:54:54,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-07-11 23:54:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 5083 transitions. [2022-07-11 23:54:54,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-11 23:54:54,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:54,225 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:54:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-11 23:54:54,225 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2113515223, now seen corresponding path program 1 times [2022-07-11 23:54:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:54,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654334181] [2022-07-11 23:54:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:54,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:54,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:54,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654334181] [2022-07-11 23:54:54,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654334181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:54,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:54,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:54:54,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688087113] [2022-07-11 23:54:54,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:54,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:54:54,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:54:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:54:54,394 INFO L87 Difference]: Start difference. First operand 3440 states and 5083 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 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) [2022-07-11 23:54:56,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:54:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:54:57,646 INFO L93 Difference]: Finished difference Result 9121 states and 13311 transitions. [2022-07-11 23:54:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:54:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 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 202 [2022-07-11 23:54:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:54:57,654 INFO L225 Difference]: With dead ends: 9121 [2022-07-11 23:54:57,655 INFO L226 Difference]: Without dead ends: 5704 [2022-07-11 23:54:57,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:54:57,658 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 502 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:54:57,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1230 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-11 23:54:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2022-07-11 23:54:57,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 3447. [2022-07-11 23:54:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 1.4770748694138132) internal successors, (5090), 3446 states have internal predecessors, (5090), 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) [2022-07-11 23:54:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5090 transitions. [2022-07-11 23:54:57,730 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5090 transitions. Word has length 202 [2022-07-11 23:54:57,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:54:57,731 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 5090 transitions. [2022-07-11 23:54:57,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 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) [2022-07-11 23:54:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5090 transitions. [2022-07-11 23:54:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-07-11 23:54:57,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:54:57,735 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-11 23:54:57,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-07-11 23:54:57,735 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:54:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:54:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 379410773, now seen corresponding path program 1 times [2022-07-11 23:54:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:54:57,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819407082] [2022-07-11 23:54:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:54:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:54:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:54:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:54:57,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:54:57,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819407082] [2022-07-11 23:54:57,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819407082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:54:57,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:54:57,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-11 23:54:57,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241185328] [2022-07-11 23:54:57,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:54:57,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 23:54:57,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:54:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 23:54:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-11 23:54:57,928 INFO L87 Difference]: Start difference. First operand 3447 states and 5090 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2022-07-11 23:54:59,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:55:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:01,335 INFO L93 Difference]: Finished difference Result 8395 states and 12284 transitions. [2022-07-11 23:55:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:55:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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 202 [2022-07-11 23:55:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:01,342 INFO L225 Difference]: With dead ends: 8395 [2022-07-11 23:55:01,342 INFO L226 Difference]: Without dead ends: 4971 [2022-07-11 23:55:01,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:55:01,345 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 299 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:01,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 1632 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-11 23:55:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4971 states. [2022-07-11 23:55:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4971 to 3454. [2022-07-11 23:55:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.476107732406603) internal successors, (5097), 3453 states have internal predecessors, (5097), 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) [2022-07-11 23:55:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5097 transitions. [2022-07-11 23:55:01,415 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5097 transitions. Word has length 202 [2022-07-11 23:55:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:01,415 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5097 transitions. [2022-07-11 23:55:01,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 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) [2022-07-11 23:55:01,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5097 transitions. [2022-07-11 23:55:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-11 23:55:01,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:01,419 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-07-11 23:55:01,420 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash 995224690, now seen corresponding path program 1 times [2022-07-11 23:55:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813934660] [2022-07-11 23:55:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:01,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-11 23:55:01,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:01,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813934660] [2022-07-11 23:55:01,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813934660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:01,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:01,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:01,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822870265] [2022-07-11 23:55:01,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:01,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:01,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:01,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:01,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:01,516 INFO L87 Difference]: Start difference. First operand 3454 states and 5097 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) [2022-07-11 23:55:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:02,109 INFO L93 Difference]: Finished difference Result 7039 states and 10380 transitions. [2022-07-11 23:55:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:02,109 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 215 [2022-07-11 23:55:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:02,113 INFO L225 Difference]: With dead ends: 7039 [2022-07-11 23:55:02,114 INFO L226 Difference]: Without dead ends: 3608 [2022-07-11 23:55:02,116 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 [2022-07-11 23:55:02,117 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 45 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:02,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 561 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2022-07-11 23:55:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3454. [2022-07-11 23:55:02,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4740805097017087) internal successors, (5090), 3453 states have internal predecessors, (5090), 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) [2022-07-11 23:55:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5090 transitions. [2022-07-11 23:55:02,180 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5090 transitions. Word has length 215 [2022-07-11 23:55:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:02,180 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5090 transitions. [2022-07-11 23:55:02,181 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) [2022-07-11 23:55:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5090 transitions. [2022-07-11 23:55:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-11 23:55:02,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:02,184 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:02,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-07-11 23:55:02,185 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash 74896286, now seen corresponding path program 1 times [2022-07-11 23:55:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:02,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356625569] [2022-07-11 23:55:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:02,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:02,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 344 proven. 38 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-11 23:55:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:02,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356625569] [2022-07-11 23:55:02,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356625569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:02,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519721631] [2022-07-11 23:55:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:02,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:02,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:02,299 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) [2022-07-11 23:55:02,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:55:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:55:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:03,093 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:03,094 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 [2022-07-11 23:55:03,129 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:55:03,130 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 [2022-07-11 23:55:03,157 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:03,157 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 [2022-07-11 23:55:03,188 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 [2022-07-11 23:55:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 330 proven. 48 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 23:55:03,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:55:03,241 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 [2022-07-11 23:55:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 334 proven. 9 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-11 23:55:03,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519721631] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:55:03,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:55:03,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 7] total 12 [2022-07-11 23:55:03,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304735168] [2022-07-11 23:55:03,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:55:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 23:55:03,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 23:55:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:55:03,282 INFO L87 Difference]: Start difference. First operand 3454 states and 5090 transitions. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 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) [2022-07-11 23:55:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:06,367 INFO L93 Difference]: Finished difference Result 9188 states and 13433 transitions. [2022-07-11 23:55:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:55:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 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 215 [2022-07-11 23:55:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:06,375 INFO L225 Difference]: With dead ends: 9188 [2022-07-11 23:55:06,375 INFO L226 Difference]: Without dead ends: 5757 [2022-07-11 23:55:06,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-07-11 23:55:06,379 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 1024 mSDsluCounter, 1714 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:06,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1951 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-11 23:55:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2022-07-11 23:55:06,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 3454. [2022-07-11 23:55:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4587315377932233) internal successors, (5037), 3453 states have internal predecessors, (5037), 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) [2022-07-11 23:55:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5037 transitions. [2022-07-11 23:55:06,484 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5037 transitions. Word has length 215 [2022-07-11 23:55:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:06,484 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5037 transitions. [2022-07-11 23:55:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 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) [2022-07-11 23:55:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5037 transitions. [2022-07-11 23:55:06,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-11 23:55:06,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:06,488 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:06,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:55:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-11 23:55:06,709 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash 82923196, now seen corresponding path program 1 times [2022-07-11 23:55:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:06,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249650669] [2022-07-11 23:55:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-11 23:55:06,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249650669] [2022-07-11 23:55:06,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249650669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:06,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:06,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:06,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730369083] [2022-07-11 23:55:06,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:06,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:06,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:06,822 INFO L87 Difference]: Start difference. First operand 3454 states and 5037 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2022-07-11 23:55:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:07,370 INFO L93 Difference]: Finished difference Result 7011 states and 10224 transitions. [2022-07-11 23:55:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 216 [2022-07-11 23:55:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:07,374 INFO L225 Difference]: With dead ends: 7011 [2022-07-11 23:55:07,374 INFO L226 Difference]: Without dead ends: 3580 [2022-07-11 23:55:07,377 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 [2022-07-11 23:55:07,378 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 38 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:07,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 551 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3580 states. [2022-07-11 23:55:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3580 to 3454. [2022-07-11 23:55:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.456704315088329) internal successors, (5030), 3453 states have internal predecessors, (5030), 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) [2022-07-11 23:55:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5030 transitions. [2022-07-11 23:55:07,477 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5030 transitions. Word has length 216 [2022-07-11 23:55:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:07,477 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5030 transitions. [2022-07-11 23:55:07,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2022-07-11 23:55:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5030 transitions. [2022-07-11 23:55:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-07-11 23:55:07,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:07,481 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:07,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-07-11 23:55:07,481 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:07,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:07,482 INFO L85 PathProgramCache]: Analyzing trace with hash 41488008, now seen corresponding path program 1 times [2022-07-11 23:55:07,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:07,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398211227] [2022-07-11 23:55:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:07,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-11 23:55:07,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398211227] [2022-07-11 23:55:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398211227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:07,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461792811] [2022-07-11 23:55:07,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:07,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:07,575 INFO L87 Difference]: Start difference. First operand 3454 states and 5030 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2022-07-11 23:55:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:08,082 INFO L93 Difference]: Finished difference Result 6977 states and 10168 transitions. [2022-07-11 23:55:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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 216 [2022-07-11 23:55:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:08,086 INFO L225 Difference]: With dead ends: 6977 [2022-07-11 23:55:08,086 INFO L226 Difference]: Without dead ends: 3546 [2022-07-11 23:55:08,089 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 [2022-07-11 23:55:08,089 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 29 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:08,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 539 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:55:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2022-07-11 23:55:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 3454. [2022-07-11 23:55:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.4546770923834347) internal successors, (5023), 3453 states have internal predecessors, (5023), 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) [2022-07-11 23:55:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5023 transitions. [2022-07-11 23:55:08,175 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5023 transitions. Word has length 216 [2022-07-11 23:55:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:08,175 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5023 transitions. [2022-07-11 23:55:08,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2022-07-11 23:55:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5023 transitions. [2022-07-11 23:55:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-11 23:55:08,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:08,179 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:55:08,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-07-11 23:55:08,179 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash 404371753, now seen corresponding path program 1 times [2022-07-11 23:55:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:08,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215997363] [2022-07-11 23:55:08,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:08,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-11 23:55:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215997363] [2022-07-11 23:55:08,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215997363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:08,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:08,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:55:08,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079891724] [2022-07-11 23:55:08,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:08,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:08,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:55:08,284 INFO L87 Difference]: Start difference. First operand 3454 states and 5023 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) [2022-07-11 23:55:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:08,894 INFO L93 Difference]: Finished difference Result 7207 states and 10456 transitions. [2022-07-11 23:55:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:08,895 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 218 [2022-07-11 23:55:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:08,898 INFO L225 Difference]: With dead ends: 7207 [2022-07-11 23:55:08,898 INFO L226 Difference]: Without dead ends: 3776 [2022-07-11 23:55:08,900 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 [2022-07-11 23:55:08,900 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 31 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:08,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 581 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-07-11 23:55:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3664. [2022-07-11 23:55:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 1.4515424515424515) internal successors, (5317), 3663 states have internal predecessors, (5317), 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) [2022-07-11 23:55:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 5317 transitions. [2022-07-11 23:55:09,015 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 5317 transitions. Word has length 218 [2022-07-11 23:55:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:09,015 INFO L495 AbstractCegarLoop]: Abstraction has 3664 states and 5317 transitions. [2022-07-11 23:55:09,015 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) [2022-07-11 23:55:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 5317 transitions. [2022-07-11 23:55:09,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-11 23:55:09,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:09,019 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2022-07-11 23:55:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-07-11 23:55:09,020 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1297638648, now seen corresponding path program 1 times [2022-07-11 23:55:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:09,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354523191] [2022-07-11 23:55:09,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:09,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 254 proven. 6 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-11 23:55:09,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:09,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354523191] [2022-07-11 23:55:09,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354523191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:09,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951525847] [2022-07-11 23:55:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:09,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:09,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:09,134 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) [2022-07-11 23:55:09,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:55:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 23:55:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:09,855 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:09,856 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 [2022-07-11 23:55:09,882 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:55:09,882 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 [2022-07-11 23:55:09,899 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 [2022-07-11 23:55:09,905 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:55:09,920 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:09,920 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:55:09,957 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 [2022-07-11 23:55:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 249 proven. 70 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-11 23:55:09,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:55:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-11 23:55:10,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951525847] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:10,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:55:10,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2022-07-11 23:55:10,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312952296] [2022-07-11 23:55:10,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:10,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:10,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:10,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:10,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:55:10,047 INFO L87 Difference]: Start difference. First operand 3664 states and 5317 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2022-07-11 23:55:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:10,647 INFO L93 Difference]: Finished difference Result 8046 states and 11661 transitions. [2022-07-11 23:55:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 223 [2022-07-11 23:55:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:10,651 INFO L225 Difference]: With dead ends: 8046 [2022-07-11 23:55:10,651 INFO L226 Difference]: Without dead ends: 4405 [2022-07-11 23:55:10,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:55:10,655 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 111 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:10,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 354 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 23:55:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4405 states. [2022-07-11 23:55:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4405 to 3923. [2022-07-11 23:55:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3923 states, 3922 states have (on average 1.4520652728199899) internal successors, (5695), 3922 states have internal predecessors, (5695), 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) [2022-07-11 23:55:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3923 states to 3923 states and 5695 transitions. [2022-07-11 23:55:10,737 INFO L78 Accepts]: Start accepts. Automaton has 3923 states and 5695 transitions. Word has length 223 [2022-07-11 23:55:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:10,737 INFO L495 AbstractCegarLoop]: Abstraction has 3923 states and 5695 transitions. [2022-07-11 23:55:10,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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) [2022-07-11 23:55:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3923 states and 5695 transitions. [2022-07-11 23:55:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-11 23:55:10,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:10,742 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2022-07-11 23:55:10,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:55:10,951 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,SelfDestructingSolverStorable42 [2022-07-11 23:55:10,952 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1442575537, now seen corresponding path program 1 times [2022-07-11 23:55:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132806563] [2022-07-11 23:55:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:10,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 252 proven. 84 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-11 23:55:11,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132806563] [2022-07-11 23:55:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132806563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652932607] [2022-07-11 23:55:11,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:11,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:11,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:11,106 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) [2022-07-11 23:55:11,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:55:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 23:55:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:11,799 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:11,800 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 [2022-07-11 23:55:11,824 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:55:11,824 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 [2022-07-11 23:55:11,837 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 [2022-07-11 23:55:11,848 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 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 23:55:11,859 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:55:11,859 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 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:55:11,896 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 [2022-07-11 23:55:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 252 proven. 69 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-11 23:55:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:55:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-11 23:55:11,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652932607] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:11,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:55:11,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 8] total 9 [2022-07-11 23:55:11,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661181978] [2022-07-11 23:55:11,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:55:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:11,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:55:11,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-11 23:55:11,940 INFO L87 Difference]: Start difference. First operand 3923 states and 5695 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) [2022-07-11 23:55:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:12,459 INFO L93 Difference]: Finished difference Result 8291 states and 12004 transitions. [2022-07-11 23:55:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:55:12,460 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 224 [2022-07-11 23:55:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:12,463 INFO L225 Difference]: With dead ends: 8291 [2022-07-11 23:55:12,464 INFO L226 Difference]: Without dead ends: 4391 [2022-07-11 23:55:12,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-11 23:55:12,466 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 110 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:12,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 358 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 23:55:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4391 states. [2022-07-11 23:55:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4391 to 3465. [2022-07-11 23:55:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.4454387990762125) internal successors, (5007), 3464 states have internal predecessors, (5007), 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) [2022-07-11 23:55:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5007 transitions. [2022-07-11 23:55:12,554 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5007 transitions. Word has length 224 [2022-07-11 23:55:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:12,554 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 5007 transitions. [2022-07-11 23:55:12,554 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) [2022-07-11 23:55:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5007 transitions. [2022-07-11 23:55:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-11 23:55:12,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:12,558 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1] [2022-07-11 23:55:12,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:55:12,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:12,779 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:12,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:12,779 INFO L85 PathProgramCache]: Analyzing trace with hash 638259024, now seen corresponding path program 1 times [2022-07-11 23:55:12,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:12,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611412822] [2022-07-11 23:55:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:12,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-07-11 23:55:12,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:12,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611412822] [2022-07-11 23:55:12,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611412822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:55:12,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:55:12,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:55:12,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577630287] [2022-07-11 23:55:12,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:55:12,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:55:12,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:55:12,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:55:12,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:55:12,977 INFO L87 Difference]: Start difference. First operand 3465 states and 5007 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2022-07-11 23:55:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:55:14,048 INFO L93 Difference]: Finished difference Result 6927 states and 10010 transitions. [2022-07-11 23:55:14,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 23:55:14,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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 230 [2022-07-11 23:55:14,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:55:14,052 INFO L225 Difference]: With dead ends: 6927 [2022-07-11 23:55:14,052 INFO L226 Difference]: Without dead ends: 3465 [2022-07-11 23:55:14,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:55:14,055 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 7 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:55:14,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 671 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 23:55:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2022-07-11 23:55:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3465. [2022-07-11 23:55:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3465 states, 3464 states have (on average 1.4451501154734412) internal successors, (5006), 3464 states have internal predecessors, (5006), 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) [2022-07-11 23:55:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5006 transitions. [2022-07-11 23:55:14,124 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5006 transitions. Word has length 230 [2022-07-11 23:55:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:55:14,124 INFO L495 AbstractCegarLoop]: Abstraction has 3465 states and 5006 transitions. [2022-07-11 23:55:14,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 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) [2022-07-11 23:55:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5006 transitions. [2022-07-11 23:55:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-11 23:55:14,127 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:55:14,127 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1] [2022-07-11 23:55:14,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-07-11 23:55:14,128 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:55:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:55:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2032488434, now seen corresponding path program 1 times [2022-07-11 23:55:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:55:14,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222173095] [2022-07-11 23:55:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:14,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:55:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 155 proven. 304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:55:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:55:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222173095] [2022-07-11 23:55:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222173095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:55:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750813227] [2022-07-11 23:55:14,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:55:14,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:55:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:55:14,906 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) [2022-07-11 23:55:14,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:55:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:55:15,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 197 conjunts are in the unsatisfiable core [2022-07-11 23:55:15,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:55:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:23,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:55:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver