./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.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/array-cav19/array_init_nondet_vars.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 b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:06:28,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:06:28,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:06:28,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:06:28,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:06:28,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:06:28,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:06:28,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:06:28,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:06:28,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:06:28,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:06:28,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:06:28,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:06:28,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:06:28,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:06:28,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:06:28,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:06:28,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:06:28,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:06:28,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:06:28,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:06:28,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:06:28,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:06:28,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:06:28,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:06:28,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:06:28,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:06:28,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:06:28,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:06:28,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:06:28,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:06:28,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:06:28,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:06:28,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:06:28,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:06:28,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:06:28,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:06:28,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:06:28,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:06:28,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:06:28,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:06:28,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:06:28,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:06:28,290 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:06:28,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:06:28,291 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:06:28,291 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:06:28,292 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:06:28,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:06:28,292 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:06:28,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:06:28,293 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:06:28,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:06:28,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:06:28,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:06:28,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:06:28,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:06:28,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:06:28,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:06:28,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:06:28,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:06:28,297 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:06:28,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:06:28,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:06:28,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-07-11 23:06:28,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:06:28,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:06:28,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:06:28,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:06:28,496 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:06:28,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-11 23:06:28,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2aa15ff/8256c04b48044fe9be1822b52f867425/FLAG8fb7da9f7 [2022-07-11 23:06:28,860 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:06:28,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-11 23:06:28,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2aa15ff/8256c04b48044fe9be1822b52f867425/FLAG8fb7da9f7 [2022-07-11 23:06:29,271 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b2aa15ff/8256c04b48044fe9be1822b52f867425 [2022-07-11 23:06:29,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:06:29,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:06:29,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:06:29,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:06:29,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:06:29,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297ad6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29, skipping insertion in model container [2022-07-11 23:06:29,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,284 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:06:29,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:06:29,428 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-07-11 23:06:29,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:06:29,455 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:06:29,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c[413,426] [2022-07-11 23:06:29,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:06:29,475 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:06:29,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29 WrapperNode [2022-07-11 23:06:29,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:06:29,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:06:29,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:06:29,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:06:29,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,497 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-11 23:06:29,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:06:29,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:06:29,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:06:29,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:06:29,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:06:29,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:06:29,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:06:29,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:06:29,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (1/1) ... [2022-07-11 23:06:29,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:06:29,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:29,531 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 23:06:29,532 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 23:06:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:06:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-11 23:06:29,558 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-11 23:06:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:06:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:06:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:06:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:06:29,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:06:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:06:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:06:29,601 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:06:29,602 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:06:29,682 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:06:29,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:06:29,686 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 23:06:29,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:06:29 BoogieIcfgContainer [2022-07-11 23:06:29,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:06:29,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:06:29,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:06:29,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:06:29,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:06:29" (1/3) ... [2022-07-11 23:06:29,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f851aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:06:29, skipping insertion in model container [2022-07-11 23:06:29,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:06:29" (2/3) ... [2022-07-11 23:06:29,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f851aca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:06:29, skipping insertion in model container [2022-07-11 23:06:29,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:06:29" (3/3) ... [2022-07-11 23:06:29,693 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-07-11 23:06:29,702 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:06:29,702 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:06:29,732 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:06:29,737 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@3268f8fe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@459016e0 [2022-07-11 23:06:29,737 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:06:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:06:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:06:29,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:29,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:29,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:29,748 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2022-07-11 23:06:29,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358345340] [2022-07-11 23:06:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:29,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:29,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:06:29,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:29,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358345340] [2022-07-11 23:06:29,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358345340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:06:29,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:06:29,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 23:06:29,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35556892] [2022-07-11 23:06:29,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:06:29,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 23:06:29,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 23:06:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:06:29,901 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:06:29,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:29,917 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2022-07-11 23:06:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 23:06:29,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-11 23:06:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:29,923 INFO L225 Difference]: With dead ends: 47 [2022-07-11 23:06:29,923 INFO L226 Difference]: Without dead ends: 21 [2022-07-11 23:06:29,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 23:06:29,929 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:29,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:06:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-11 23:06:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-11 23:06:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:06:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-11 23:06:29,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2022-07-11 23:06:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:29,956 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-11 23:06:29,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:06:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-11 23:06:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-11 23:06:29,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:29,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:29,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:06:29,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:29,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2022-07-11 23:06:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:29,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544328802] [2022-07-11 23:06:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:29,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:06:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544328802] [2022-07-11 23:06:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544328802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:06:30,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:06:30,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:06:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175276191] [2022-07-11 23:06:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:06:30,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:06:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:06:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:06:30,119 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:06:30,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:30,155 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-11 23:06:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:06:30,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-11 23:06:30,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:30,156 INFO L225 Difference]: With dead ends: 39 [2022-07-11 23:06:30,156 INFO L226 Difference]: Without dead ends: 31 [2022-07-11 23:06:30,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 23:06:30,157 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:30,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:06:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-11 23:06:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-11 23:06:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:06:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-11 23:06:30,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2022-07-11 23:06:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:30,162 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-11 23:06:30,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:06:30,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-11 23:06:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-11 23:06:30,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:30,164 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:30,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:06:30,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2022-07-11 23:06:30,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:30,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344002683] [2022-07-11 23:06:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:06:30,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:30,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344002683] [2022-07-11 23:06:30,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344002683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:30,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585401383] [2022-07-11 23:06:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:30,306 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 23:06:30,332 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 23:06:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:30,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:06:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:30,546 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 23:06:30,581 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 23:06:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:06:30,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:30,643 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 16 treesize of output 14 [2022-07-11 23:06:30,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:06:30,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585401383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:30,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:30,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-11 23:06:30,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983853571] [2022-07-11 23:06:30,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:30,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:06:30,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:30,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:06:30,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:06:30,858 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 23:06:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:31,119 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-07-11 23:06:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-11 23:06:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-07-11 23:06:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:31,122 INFO L225 Difference]: With dead ends: 48 [2022-07-11 23:06:31,122 INFO L226 Difference]: Without dead ends: 46 [2022-07-11 23:06:31,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-07-11 23:06:31,127 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:31,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:06:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-11 23:06:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-11 23:06:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 23:06:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-11 23:06:31,144 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-07-11 23:06:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:31,145 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-11 23:06:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 23:06:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-11 23:06:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 23:06:31,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:31,147 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:31,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:06:31,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:31,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2022-07-11 23:06:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:31,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303524782] [2022-07-11 23:06:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:31,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:31,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:31,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:31,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:31,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:31,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303524782] [2022-07-11 23:06:31,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303524782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187454843] [2022-07-11 23:06:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:31,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:31,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:31,488 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 23:06:31,519 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 23:06:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:31,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:06:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:31,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187454843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:31,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:31,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:06:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975743849] [2022-07-11 23:06:31,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:31,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:06:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:06:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:06:31,649 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 23:06:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:31,696 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-11 23:06:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:06:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-11 23:06:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:31,698 INFO L225 Difference]: With dead ends: 53 [2022-07-11 23:06:31,698 INFO L226 Difference]: Without dead ends: 41 [2022-07-11 23:06:31,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:06:31,699 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:31,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:06:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-11 23:06:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-07-11 23:06:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 23:06:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-11 23:06:31,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-07-11 23:06:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:31,717 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-11 23:06:31,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 23:06:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-11 23:06:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 23:06:31,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:31,718 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:31,735 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 23:06:31,935 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,SelfDestructingSolverStorable3 [2022-07-11 23:06:31,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2022-07-11 23:06:31,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:31,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194805288] [2022-07-11 23:06:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:32,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:32,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:32,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:32,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:32,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194805288] [2022-07-11 23:06:32,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194805288] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:32,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913012835] [2022-07-11 23:06:32,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:06:32,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:32,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:32,129 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 23:06:32,134 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 23:06:32,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:06:32,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 23:06:32,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:32,231 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 15 treesize of output 11 [2022-07-11 23:06:32,302 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:32,302 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 25 treesize of output 24 [2022-07-11 23:06:32,320 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 23:06:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:06:32,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:32,401 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 16 treesize of output 14 [2022-07-11 23:06:32,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:32,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913012835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:32,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:32,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-11 23:06:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33443916] [2022-07-11 23:06:32,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:32,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:06:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:06:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:06:32,497 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 23:06:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:32,707 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-07-11 23:06:32,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:06:32,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2022-07-11 23:06:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:32,709 INFO L225 Difference]: With dead ends: 55 [2022-07-11 23:06:32,709 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 23:06:32,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-07-11 23:06:32,710 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:32,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-07-11 23:06:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 23:06:32,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-11 23:06:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-11 23:06:32,715 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2022-07-11 23:06:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:32,715 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-11 23:06:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 23:06:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-11 23:06:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 23:06:32,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:32,716 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:32,751 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 23:06:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:32,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:32,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2022-07-11 23:06:32,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:32,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792878401] [2022-07-11 23:06:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:32,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:33,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:33,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:33,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:33,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:33,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792878401] [2022-07-11 23:06:33,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792878401] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594739584] [2022-07-11 23:06:33,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:06:33,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:33,140 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 23:06:33,167 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 23:06:33,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:06:33,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:33,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 23:06:33,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:33,275 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 15 treesize of output 11 [2022-07-11 23:06:33,429 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:06:33,429 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 25 treesize of output 12 [2022-07-11 23:06:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:33,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:33,648 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 18 [2022-07-11 23:06:33,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:06:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:33,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594739584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:33,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:33,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-11 23:06:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268320987] [2022-07-11 23:06:33,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:33,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 23:06:33,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 23:06:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-07-11 23:06:33,826 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:34,202 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-11 23:06:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:06:34,202 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2022-07-11 23:06:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:34,203 INFO L225 Difference]: With dead ends: 54 [2022-07-11 23:06:34,203 INFO L226 Difference]: Without dead ends: 42 [2022-07-11 23:06:34,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-07-11 23:06:34,204 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:34,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 237 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-11 23:06:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-11 23:06:34,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-11 23:06:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:34,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-11 23:06:34,210 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2022-07-11 23:06:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:34,210 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-11 23:06:34,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-11 23:06:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 23:06:34,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:34,212 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:34,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:34,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2022-07-11 23:06:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371023784] [2022-07-11 23:06:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:34,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:34,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:06:34,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:34,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371023784] [2022-07-11 23:06:34,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371023784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004218968] [2022-07-11 23:06:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:06:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:34,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:34,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:34,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:06:34,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 23:06:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 23:06:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:34,731 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 15 treesize of output 11 [2022-07-11 23:06:36,868 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:06:36,869 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 27 treesize of output 26 [2022-07-11 23:06:36,914 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 23 treesize of output 7 [2022-07-11 23:06:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:06:36,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:37,053 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 16 treesize of output 14 [2022-07-11 23:06:37,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:06:37,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004218968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:37,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:37,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2022-07-11 23:06:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150644767] [2022-07-11 23:06:37,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:37,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:06:37,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:37,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:06:37,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=472, Unknown=1, NotChecked=0, Total=552 [2022-07-11 23:06:37,254 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:37,509 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-11 23:06:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 23:06:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-07-11 23:06:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:37,510 INFO L225 Difference]: With dead ends: 60 [2022-07-11 23:06:37,510 INFO L226 Difference]: Without dead ends: 58 [2022-07-11 23:06:37,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=174, Invalid=1015, Unknown=1, NotChecked=0, Total=1190 [2022-07-11 23:06:37,511 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:37,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 254 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 256 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-11 23:06:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-11 23:06:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-07-11 23:06:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-11 23:06:37,520 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2022-07-11 23:06:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:37,521 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-11 23:06:37,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-11 23:06:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:06:37,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:37,523 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:37,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:37,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:37,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2022-07-11 23:06:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293799125] [2022-07-11 23:06:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:37,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:37,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293799125] [2022-07-11 23:06:37,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293799125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:37,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649238866] [2022-07-11 23:06:37,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:06:37,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:37,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:37,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:06:38,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-11 23:06:38,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:38,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-11 23:06:38,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:38,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 23:06:38,176 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:38,177 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 25 treesize of output 24 [2022-07-11 23:06:38,224 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:38,224 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 25 treesize of output 24 [2022-07-11 23:06:38,287 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:38,287 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 25 treesize of output 24 [2022-07-11 23:06:38,302 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 23:06:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-11 23:06:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:38,468 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 16 treesize of output 14 [2022-07-11 23:06:38,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-11 23:06:38,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649238866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:38,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:38,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 22 [2022-07-11 23:06:38,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974902991] [2022-07-11 23:06:38,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:38,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:06:38,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:38,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:06:38,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-11 23:06:38,556 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-11 23:06:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:38,803 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-07-11 23:06:38,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-11 23:06:38,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 51 [2022-07-11 23:06:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:38,804 INFO L225 Difference]: With dead ends: 71 [2022-07-11 23:06:38,804 INFO L226 Difference]: Without dead ends: 69 [2022-07-11 23:06:38,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-11 23:06:38,805 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:38,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 255 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-07-11 23:06:38,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-11 23:06:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-07-11 23:06:38,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-11 23:06:38,811 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2022-07-11 23:06:38,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:38,811 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-11 23:06:38,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-11 23:06:38,812 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-11 23:06:38,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 23:06:38,812 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:38,812 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:38,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:39,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:39,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2022-07-11 23:06:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988899252] [2022-07-11 23:06:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:06:39,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988899252] [2022-07-11 23:06:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988899252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602199685] [2022-07-11 23:06:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:06:39,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:39,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:39,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:39,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:06:39,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:06:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 23:06:39,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:39,407 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 23:06:39,493 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 23:06:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:06:39,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:39,589 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 16 treesize of output 14 [2022-07-11 23:06:39,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:39,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602199685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:39,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:39,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-07-11 23:06:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276718936] [2022-07-11 23:06:39,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:39,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 23:06:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:39,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 23:06:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-11 23:06:39,648 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-11 23:06:40,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:40,329 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-11 23:06:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:06:40,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2022-07-11 23:06:40,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:40,330 INFO L225 Difference]: With dead ends: 86 [2022-07-11 23:06:40,330 INFO L226 Difference]: Without dead ends: 84 [2022-07-11 23:06:40,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 23:06:40,332 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:40,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 285 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:06:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-11 23:06:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2022-07-11 23:06:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:40,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-11 23:06:40,339 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2022-07-11 23:06:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:40,339 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-11 23:06:40,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-11 23:06:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-11 23:06:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:06:40,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:40,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:40,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:40,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:40,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:40,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2022-07-11 23:06:40,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:40,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313485443] [2022-07-11 23:06:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:40,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:40,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313485443] [2022-07-11 23:06:40,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313485443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512980711] [2022-07-11 23:06:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:06:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:40,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:40,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:06:40,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-11 23:06:40,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-11 23:06:40,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:41,028 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 15 treesize of output 11 [2022-07-11 23:06:41,100 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:41,103 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 25 treesize of output 24 [2022-07-11 23:06:41,175 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:41,175 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 25 treesize of output 24 [2022-07-11 23:06:41,206 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 23 treesize of output 7 [2022-07-11 23:06:41,226 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 23:06:41,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:41,340 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 16 treesize of output 14 [2022-07-11 23:06:41,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-11 23:06:41,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512980711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:41,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-07-11 23:06:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282212071] [2022-07-11 23:06:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:41,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 23:06:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 23:06:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-11 23:06:41,439 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-11 23:06:41,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:41,688 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-07-11 23:06:41,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:06:41,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-07-11 23:06:41,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:41,689 INFO L225 Difference]: With dead ends: 73 [2022-07-11 23:06:41,689 INFO L226 Difference]: Without dead ends: 71 [2022-07-11 23:06:41,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 23:06:41,690 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:41,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-11 23:06:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-11 23:06:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-11 23:06:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-11 23:06:41,695 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2022-07-11 23:06:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:41,695 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-11 23:06:41,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-11 23:06:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-11 23:06:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 23:06:41,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:41,696 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:41,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:41,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 23:06:41,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:41,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2022-07-11 23:06:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:41,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563467062] [2022-07-11 23:06:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:41,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:06:41,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563467062] [2022-07-11 23:06:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563467062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817302711] [2022-07-11 23:06:41,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:06:41,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:41,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:41,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:06:42,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:06:42,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:42,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:06:42,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:06:42,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:06:42,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817302711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:42,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:42,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-11 23:06:42,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573197967] [2022-07-11 23:06:42,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:42,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 23:06:42,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 23:06:42,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:06:42,151 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-11 23:06:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:42,261 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-11 23:06:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:06:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2022-07-11 23:06:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:42,262 INFO L225 Difference]: With dead ends: 89 [2022-07-11 23:06:42,262 INFO L226 Difference]: Without dead ends: 69 [2022-07-11 23:06:42,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-11 23:06:42,263 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:42,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:06:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-11 23:06:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-07-11 23:06:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:06:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-11 23:06:42,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2022-07-11 23:06:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:42,269 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-11 23:06:42,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-11 23:06:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-11 23:06:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 23:06:42,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:42,269 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:42,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:42,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:42,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2022-07-11 23:06:42,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:42,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859626909] [2022-07-11 23:06:42,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:42,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:42,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859626909] [2022-07-11 23:06:42,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859626909] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:42,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228682519] [2022-07-11 23:06:42,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:06:42,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:42,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:42,705 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:42,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:06:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-11 23:06:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:42,850 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 15 treesize of output 11 [2022-07-11 23:06:42,929 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:42,930 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 25 treesize of output 24 [2022-07-11 23:06:43,006 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 23:06:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-11 23:06:43,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:43,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228682519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:43,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:43,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2022-07-11 23:06:43,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757003165] [2022-07-11 23:06:43,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 23:06:43,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:43,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 23:06:43,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:06:43,143 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-11 23:06:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:43,699 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-07-11 23:06:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 23:06:43,700 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2022-07-11 23:06:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:43,700 INFO L225 Difference]: With dead ends: 84 [2022-07-11 23:06:43,700 INFO L226 Difference]: Without dead ends: 82 [2022-07-11 23:06:43,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 23:06:43,701 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:43,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 303 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 528 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-07-11 23:06:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-11 23:06:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-07-11 23:06:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:06:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-11 23:06:43,708 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2022-07-11 23:06:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:43,708 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-11 23:06:43,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-11 23:06:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-11 23:06:43,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 23:06:43,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:43,709 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:43,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 23:06:43,920 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2022-07-11 23:06:43,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:43,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112875528] [2022-07-11 23:06:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:44,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112875528] [2022-07-11 23:06:44,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112875528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:44,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29970418] [2022-07-11 23:06:44,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:06:44,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:44,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:44,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:06:44,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:06:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:44,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 23:06:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:44,328 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 15 treesize of output 11 [2022-07-11 23:06:44,575 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:06:44,575 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 25 treesize of output 12 [2022-07-11 23:06:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:44,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:44,880 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 18 [2022-07-11 23:06:44,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:06:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:45,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29970418] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:45,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:45,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-07-11 23:06:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590538976] [2022-07-11 23:06:45,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:45,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-11 23:06:45,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:45,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-11 23:06:45,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 23:06:45,127 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-11 23:06:45,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:45,759 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-11 23:06:45,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 23:06:45,759 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2022-07-11 23:06:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:45,760 INFO L225 Difference]: With dead ends: 80 [2022-07-11 23:06:45,760 INFO L226 Difference]: Without dead ends: 60 [2022-07-11 23:06:45,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2022-07-11 23:06:45,761 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:45,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 254 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-07-11 23:06:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-11 23:06:45,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-11 23:06:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:06:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-07-11 23:06:45,766 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 63 [2022-07-11 23:06:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:45,767 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-07-11 23:06:45,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-11 23:06:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-07-11 23:06:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 23:06:45,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:45,768 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:45,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 23:06:45,979 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1918482698, now seen corresponding path program 9 times [2022-07-11 23:06:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079531538] [2022-07-11 23:06:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:45,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-11 23:06:46,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079531538] [2022-07-11 23:06:46,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079531538] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776746799] [2022-07-11 23:06:46,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:06:46,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:46,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:46,248 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:46,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:06:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-11 23:06:46,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:46,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-11 23:06:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:46,414 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 15 treesize of output 11 [2022-07-11 23:06:46,501 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:46,501 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 25 treesize of output 24 [2022-07-11 23:06:46,574 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:46,574 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 25 treesize of output 24 [2022-07-11 23:06:46,667 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 23:06:46,684 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-11 23:06:46,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:46,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776746799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:46,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:46,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-07-11 23:06:46,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385912243] [2022-07-11 23:06:46,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:46,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 23:06:46,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:46,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 23:06:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 23:06:46,792 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-11 23:06:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:47,255 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-11 23:06:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 23:06:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2022-07-11 23:06:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:47,257 INFO L225 Difference]: With dead ends: 74 [2022-07-11 23:06:47,257 INFO L226 Difference]: Without dead ends: 72 [2022-07-11 23:06:47,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2022-07-11 23:06:47,258 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:47,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-11 23:06:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-11 23:06:47,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-11 23:06:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:06:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-11 23:06:47,264 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 67 [2022-07-11 23:06:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:47,265 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-11 23:06:47,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-11 23:06:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-11 23:06:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 23:06:47,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:47,266 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:47,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-11 23:06:47,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 23:06:47,483 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:47,483 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 10 times [2022-07-11 23:06:47,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:47,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176648967] [2022-07-11 23:06:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:47,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:47,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-11 23:06:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176648967] [2022-07-11 23:06:47,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176648967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001661659] [2022-07-11 23:06:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:06:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:47,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:47,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:06:47,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:06:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-11 23:06:47,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:47,872 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 15 treesize of output 11 [2022-07-11 23:06:50,020 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:06:50,020 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 27 treesize of output 26 [2022-07-11 23:06:50,109 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 23 treesize of output 7 [2022-07-11 23:06:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-11 23:06:50,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:50,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001661659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:50,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:50,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2022-07-11 23:06:50,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521675744] [2022-07-11 23:06:50,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:50,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 23:06:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:50,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 23:06:50,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2022-07-11 23:06:50,197 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:50,498 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-11 23:06:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:06:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 71 [2022-07-11 23:06:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:50,499 INFO L225 Difference]: With dead ends: 98 [2022-07-11 23:06:50,500 INFO L226 Difference]: Without dead ends: 96 [2022-07-11 23:06:50,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=184, Invalid=1297, Unknown=1, NotChecked=0, Total=1482 [2022-07-11 23:06:50,500 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:50,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 295 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 433 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-11 23:06:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-11 23:06:50,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-07-11 23:06:50,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 23:06:50,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-11 23:06:50,507 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2022-07-11 23:06:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:50,508 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-11 23:06:50,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-11 23:06:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-11 23:06:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 23:06:50,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:50,509 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:50,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:50,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 23:06:50,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:50,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 11 times [2022-07-11 23:06:50,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:50,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830659289] [2022-07-11 23:06:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:50,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-11 23:06:50,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:50,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830659289] [2022-07-11 23:06:50,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830659289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:50,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142255577] [2022-07-11 23:06:50,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:06:50,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:50,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:50,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:50,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:06:51,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-11 23:06:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 23:06:51,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:51,156 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 15 treesize of output 11 [2022-07-11 23:06:51,282 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 23 treesize of output 7 [2022-07-11 23:06:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-11 23:06:51,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:51,363 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 16 treesize of output 14 [2022-07-11 23:06:51,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:51,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142255577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:51,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:51,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 24 [2022-07-11 23:06:51,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688283756] [2022-07-11 23:06:51,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:51,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:06:51,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:51,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:06:51,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-11 23:06:51,422 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 23:06:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:52,078 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-07-11 23:06:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-11 23:06:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 75 [2022-07-11 23:06:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:52,080 INFO L225 Difference]: With dead ends: 118 [2022-07-11 23:06:52,080 INFO L226 Difference]: Without dead ends: 116 [2022-07-11 23:06:52,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-07-11 23:06:52,081 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:52,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 440 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:06:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-11 23:06:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2022-07-11 23:06:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 23:06:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-11 23:06:52,091 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2022-07-11 23:06:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:52,091 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-11 23:06:52,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-11 23:06:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-11 23:06:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-11 23:06:52,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:52,092 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:52,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:52,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:52,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 12 times [2022-07-11 23:06:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:52,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268758860] [2022-07-11 23:06:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:06:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:06:52,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:52,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268758860] [2022-07-11 23:06:52,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268758860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:52,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089576791] [2022-07-11 23:06:52,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:06:52,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:52,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:52,547 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:52,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:06:52,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-11 23:06:52,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:52,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 23:06:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:52,752 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 15 treesize of output 11 [2022-07-11 23:06:52,819 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:52,819 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 25 treesize of output 24 [2022-07-11 23:06:52,890 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:52,891 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 25 treesize of output 24 [2022-07-11 23:06:52,967 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 23 treesize of output 7 [2022-07-11 23:06:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:06:52,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:53,116 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 16 treesize of output 14 [2022-07-11 23:06:53,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-11 23:06:53,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089576791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:53,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:53,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-11 23:06:53,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800477622] [2022-07-11 23:06:53,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:53,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 23:06:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 23:06:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:06:53,250 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-11 23:06:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:53,484 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-11 23:06:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:06:53,485 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) Word has length 79 [2022-07-11 23:06:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:53,485 INFO L225 Difference]: With dead ends: 100 [2022-07-11 23:06:53,485 INFO L226 Difference]: Without dead ends: 98 [2022-07-11 23:06:53,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-07-11 23:06:53,486 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:53,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 603 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-07-11 23:06:53,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-11 23:06:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-07-11 23:06:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 23:06:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-11 23:06:53,497 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2022-07-11 23:06:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:53,497 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-11 23:06:53,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-11 23:06:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-11 23:06:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-11 23:06:53,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:53,498 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:53,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 23:06:53,714 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 13 times [2022-07-11 23:06:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:53,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671408590] [2022-07-11 23:06:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:53,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 23:06:53,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:53,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671408590] [2022-07-11 23:06:53,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671408590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:53,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787469419] [2022-07-11 23:06:53,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:06:53,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:53,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:53,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 23:06:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:06:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 23:06:54,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 23:06:54,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787469419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:54,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:54,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-11 23:06:54,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18587285] [2022-07-11 23:06:54,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:54,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 23:06:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 23:06:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:06:54,101 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:06:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:54,222 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-07-11 23:06:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 23:06:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2022-07-11 23:06:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:54,223 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:06:54,223 INFO L226 Difference]: Without dead ends: 93 [2022-07-11 23:06:54,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:06:54,224 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:54,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 232 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:06:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-11 23:06:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-07-11 23:06:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 23:06:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-07-11 23:06:54,231 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2022-07-11 23:06:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:54,231 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-07-11 23:06:54,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:06:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-07-11 23:06:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-11 23:06:54,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:54,232 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:54,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:54,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 23:06:54,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:54,449 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 14 times [2022-07-11 23:06:54,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:54,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461091047] [2022-07-11 23:06:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:06:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:06:54,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461091047] [2022-07-11 23:06:54,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461091047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941794494] [2022-07-11 23:06:54,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:06:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:54,728 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:54,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 23:06:54,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:06:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 23:06:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:54,942 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 15 treesize of output 11 [2022-07-11 23:06:55,093 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:06:55,093 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 27 treesize of output 26 [2022-07-11 23:06:55,228 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 23 treesize of output 7 [2022-07-11 23:06:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-11 23:06:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:55,353 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 16 treesize of output 14 [2022-07-11 23:06:55,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:06:55,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941794494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:55,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:55,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 38 [2022-07-11 23:06:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247989920] [2022-07-11 23:06:55,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:55,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-11 23:06:55,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-11 23:06:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2022-07-11 23:06:55,532 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-11 23:06:55,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:55,939 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2022-07-11 23:06:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 23:06:55,939 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 83 [2022-07-11 23:06:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:55,940 INFO L225 Difference]: With dead ends: 113 [2022-07-11 23:06:55,940 INFO L226 Difference]: Without dead ends: 111 [2022-07-11 23:06:55,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=2395, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:06:55,941 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:55,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 436 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 719 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-07-11 23:06:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-11 23:06:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2022-07-11 23:06:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:06:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-07-11 23:06:55,952 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2022-07-11 23:06:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:55,952 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-07-11 23:06:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-11 23:06:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-07-11 23:06:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-11 23:06:55,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:55,953 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:55,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:56,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:56,170 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 15 times [2022-07-11 23:06:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:56,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279285425] [2022-07-11 23:06:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:56,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:56,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:06:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:06:56,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:56,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279285425] [2022-07-11 23:06:56,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279285425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:56,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493900506] [2022-07-11 23:06:56,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:06:56,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:56,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:56,437 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:56,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 23:06:56,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 23:06:56,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:56,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-11 23:06:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:56,830 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 15 treesize of output 11 [2022-07-11 23:06:57,211 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-11 23:06:57,211 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 21 treesize of output 10 [2022-07-11 23:06:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:06:57,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:57,506 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 16 treesize of output 14 [2022-07-11 23:06:57,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493900506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:57,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:06:57,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2022-07-11 23:06:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846235697] [2022-07-11 23:06:57,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-11 23:06:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-11 23:06:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 23:06:57,583 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-11 23:06:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:57,980 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-07-11 23:06:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 23:06:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 87 [2022-07-11 23:06:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:57,981 INFO L225 Difference]: With dead ends: 112 [2022-07-11 23:06:57,981 INFO L226 Difference]: Without dead ends: 110 [2022-07-11 23:06:57,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=374, Invalid=2706, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 23:06:57,982 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:57,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 679 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-11 23:06:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-11 23:06:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-07-11 23:06:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:06:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-11 23:06:57,995 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2022-07-11 23:06:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:57,995 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-11 23:06:57,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-11 23:06:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-11 23:06:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 23:06:57,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:57,996 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:58,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-11 23:06:58,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:58,212 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:06:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:06:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 16 times [2022-07-11 23:06:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:06:58,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496086768] [2022-07-11 23:06:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:06:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:06:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:06:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:06:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:06:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:06:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:06:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:06:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:06:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:06:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:06:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:06:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:06:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:06:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496086768] [2022-07-11 23:06:58,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496086768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:06:58,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590750928] [2022-07-11 23:06:58,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:06:58,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:06:58,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:06:58,462 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:06:58,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-11 23:06:58,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:06:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:06:58,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-11 23:06:58,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:06:58,731 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 15 treesize of output 11 [2022-07-11 23:06:58,800 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:58,800 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 25 treesize of output 24 [2022-07-11 23:06:58,892 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:06:58,892 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 25 treesize of output 24 [2022-07-11 23:06:59,002 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 23 treesize of output 7 [2022-07-11 23:06:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-11 23:06:59,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:06:59,151 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 16 treesize of output 14 [2022-07-11 23:06:59,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:06:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-11 23:06:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590750928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:06:59,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:06:59,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-07-11 23:06:59,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129839662] [2022-07-11 23:06:59,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:06:59,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 23:06:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:06:59,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 23:06:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 23:06:59,295 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-11 23:06:59,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:06:59,865 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-07-11 23:06:59,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-11 23:06:59,865 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 91 [2022-07-11 23:06:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:06:59,871 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:06:59,871 INFO L226 Difference]: Without dead ends: 119 [2022-07-11 23:06:59,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 173 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 23:06:59,872 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:06:59,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 629 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1101 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-07-11 23:06:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-11 23:06:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2022-07-11 23:06:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:06:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-11 23:06:59,901 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2022-07-11 23:06:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:06:59,902 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-11 23:06:59,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-11 23:06:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-11 23:06:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-11 23:06:59,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:06:59,903 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:06:59,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:00,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:00,121 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:00,122 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 17 times [2022-07-11 23:07:00,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:00,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860116719] [2022-07-11 23:07:00,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:00,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:00,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-11 23:07:00,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860116719] [2022-07-11 23:07:00,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860116719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:00,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719453797] [2022-07-11 23:07:00,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:07:00,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:00,252 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:00,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-11 23:07:00,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-11 23:07:00,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 23:07:00,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:00,466 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-11 23:07:00,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-11 23:07:00,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719453797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:00,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:00,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-11 23:07:00,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733717573] [2022-07-11 23:07:00,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:00,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 23:07:00,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 23:07:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:07:00,542 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-11 23:07:00,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:00,690 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-07-11 23:07:00,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 23:07:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2022-07-11 23:07:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:00,692 INFO L225 Difference]: With dead ends: 137 [2022-07-11 23:07:00,692 INFO L226 Difference]: Without dead ends: 105 [2022-07-11 23:07:00,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 23:07:00,693 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:00,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 183 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:07:00,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-11 23:07:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2022-07-11 23:07:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:07:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-11 23:07:00,703 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2022-07-11 23:07:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:00,703 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-11 23:07:00,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-11 23:07:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-11 23:07:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 23:07:00,705 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:00,705 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:00,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:00,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-11 23:07:00,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:00,925 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 18 times [2022-07-11 23:07:00,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:00,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156856934] [2022-07-11 23:07:00,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:00,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:01,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156856934] [2022-07-11 23:07:01,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156856934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:01,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142727599] [2022-07-11 23:07:01,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:07:01,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:01,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:01,266 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:01,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-11 23:07:01,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-11 23:07:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-11 23:07:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:01,564 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 15 treesize of output 11 [2022-07-11 23:07:01,662 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:01,662 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 27 treesize of output 26 [2022-07-11 23:07:01,769 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 23 treesize of output 7 [2022-07-11 23:07:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-11 23:07:01,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:01,876 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 16 treesize of output 14 [2022-07-11 23:07:01,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:02,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142727599] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:02,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:02,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-11 23:07:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883140082] [2022-07-11 23:07:02,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-11 23:07:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-11 23:07:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 23:07:02,048 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-11 23:07:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:02,597 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2022-07-11 23:07:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-11 23:07:02,597 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 95 [2022-07-11 23:07:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:02,602 INFO L225 Difference]: With dead ends: 129 [2022-07-11 23:07:02,602 INFO L226 Difference]: Without dead ends: 127 [2022-07-11 23:07:02,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2022-07-11 23:07:02,605 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:02,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 543 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 994 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-07-11 23:07:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-11 23:07:02,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-07-11 23:07:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:07:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-07-11 23:07:02,625 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2022-07-11 23:07:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:02,625 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-07-11 23:07:02,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-11 23:07:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-07-11 23:07:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 23:07:02,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:02,632 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:02,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-11 23:07:02,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-11 23:07:02,835 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 19 times [2022-07-11 23:07:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:02,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111527720] [2022-07-11 23:07:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:03,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:03,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111527720] [2022-07-11 23:07:03,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111527720] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:03,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869995883] [2022-07-11 23:07:03,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:07:03,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:03,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:03,109 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:03,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-11 23:07:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-11 23:07:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:03,470 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 23:07:03,651 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 23 treesize of output 7 [2022-07-11 23:07:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:03,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:03,753 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 16 treesize of output 14 [2022-07-11 23:07:03,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869995883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:03,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:03,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2022-07-11 23:07:03,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650302365] [2022-07-11 23:07:03,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:03,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-11 23:07:03,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:03,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-11 23:07:03,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 23:07:03,954 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-11 23:07:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:04,897 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-07-11 23:07:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-11 23:07:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 99 [2022-07-11 23:07:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:04,898 INFO L225 Difference]: With dead ends: 150 [2022-07-11 23:07:04,898 INFO L226 Difference]: Without dead ends: 148 [2022-07-11 23:07:04,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2022-07-11 23:07:04,901 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:04,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1278 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-07-11 23:07:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-11 23:07:04,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2022-07-11 23:07:04,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:07:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-11 23:07:04,915 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2022-07-11 23:07:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:04,918 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-11 23:07:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-11 23:07:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-11 23:07:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 23:07:04,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:04,919 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:04,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:05,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:05,123 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:05,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:05,124 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 20 times [2022-07-11 23:07:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:05,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117307760] [2022-07-11 23:07:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:05,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:05,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117307760] [2022-07-11 23:07:05,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117307760] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380648562] [2022-07-11 23:07:05,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:07:05,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:05,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:05,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:05,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-11 23:07:05,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:07:05,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:05,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-11 23:07:05,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:05,730 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 15 treesize of output 11 [2022-07-11 23:07:05,799 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:05,799 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 25 treesize of output 24 [2022-07-11 23:07:05,877 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:05,877 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 25 treesize of output 24 [2022-07-11 23:07:05,978 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 23 treesize of output 7 [2022-07-11 23:07:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-11 23:07:06,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:06,171 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 16 treesize of output 14 [2022-07-11 23:07:06,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-11 23:07:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380648562] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:06,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:06,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-07-11 23:07:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083169566] [2022-07-11 23:07:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:06,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-11 23:07:06,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-11 23:07:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-11 23:07:06,281 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-11 23:07:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:06,689 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2022-07-11 23:07:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-11 23:07:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) Word has length 103 [2022-07-11 23:07:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:06,690 INFO L225 Difference]: With dead ends: 137 [2022-07-11 23:07:06,690 INFO L226 Difference]: Without dead ends: 135 [2022-07-11 23:07:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 197 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 23:07:06,692 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:06,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 492 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1125 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-07-11 23:07:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-11 23:07:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-07-11 23:07:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:07:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-11 23:07:06,707 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2022-07-11 23:07:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:06,707 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-11 23:07:06,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-11 23:07:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-11 23:07:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 23:07:06,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:06,713 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:06,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:06,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:06,928 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:06,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:06,928 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 21 times [2022-07-11 23:07:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:06,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242656791] [2022-07-11 23:07:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:06,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-11 23:07:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:07,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242656791] [2022-07-11 23:07:07,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242656791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:07,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808821517] [2022-07-11 23:07:07,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:07:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:07,060 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:07,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-11 23:07:07,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 23:07:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:07:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-11 23:07:07,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-11 23:07:07,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808821517] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:07,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:07,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-11 23:07:07,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642806843] [2022-07-11 23:07:07,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 23:07:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 23:07:07,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:07:07,531 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-11 23:07:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:07,706 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-07-11 23:07:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:07:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2022-07-11 23:07:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:07,707 INFO L225 Difference]: With dead ends: 153 [2022-07-11 23:07:07,707 INFO L226 Difference]: Without dead ends: 117 [2022-07-11 23:07:07,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 23:07:07,708 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:07,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 219 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:07:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-11 23:07:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-07-11 23:07:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:07:07,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-07-11 23:07:07,720 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2022-07-11 23:07:07,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:07,720 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-07-11 23:07:07,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-11 23:07:07,720 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-07-11 23:07:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-11 23:07:07,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:07,721 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:07,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-11 23:07:07,937 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 22 times [2022-07-11 23:07:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:07,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045710848] [2022-07-11 23:07:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:08,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:08,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045710848] [2022-07-11 23:07:08,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045710848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:08,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094518507] [2022-07-11 23:07:08,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:07:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:08,280 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:08,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-11 23:07:08,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:07:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:08,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-11 23:07:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:08,672 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 15 treesize of output 11 [2022-07-11 23:07:08,815 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:08,815 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 27 treesize of output 26 [2022-07-11 23:07:09,015 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 23 treesize of output 7 [2022-07-11 23:07:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 23:07:09,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:09,169 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 16 treesize of output 14 [2022-07-11 23:07:09,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:09,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094518507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:09,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:09,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 46 [2022-07-11 23:07:09,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771624715] [2022-07-11 23:07:09,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:09,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-11 23:07:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-11 23:07:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2022-07-11 23:07:09,364 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-11 23:07:09,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:09,901 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-07-11 23:07:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 23:07:09,902 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) Word has length 107 [2022-07-11 23:07:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:09,902 INFO L225 Difference]: With dead ends: 140 [2022-07-11 23:07:09,903 INFO L226 Difference]: Without dead ends: 138 [2022-07-11 23:07:09,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2022-07-11 23:07:09,903 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:09,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 737 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1335 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-07-11 23:07:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-11 23:07:09,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2022-07-11 23:07:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 23:07:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-07-11 23:07:09,919 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2022-07-11 23:07:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:09,919 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-07-11 23:07:09,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-11 23:07:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-07-11 23:07:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:07:09,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:09,920 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:09,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:10,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-11 23:07:10,125 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 23 times [2022-07-11 23:07:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:10,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233135895] [2022-07-11 23:07:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:10,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:10,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:10,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233135895] [2022-07-11 23:07:10,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233135895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684020706] [2022-07-11 23:07:10,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:07:10,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:10,375 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:10,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-11 23:07:10,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-11 23:07:10,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-11 23:07:10,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:10,691 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 23:07:10,852 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 23 treesize of output 7 [2022-07-11 23:07:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:10,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:10,951 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 16 treesize of output 14 [2022-07-11 23:07:10,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684020706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:11,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:11,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 44 [2022-07-11 23:07:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528035735] [2022-07-11 23:07:11,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:11,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-11 23:07:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-11 23:07:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 23:07:11,081 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-11 23:07:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:12,094 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-07-11 23:07:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-11 23:07:12,095 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-07-11 23:07:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:12,096 INFO L225 Difference]: With dead ends: 166 [2022-07-11 23:07:12,096 INFO L226 Difference]: Without dead ends: 164 [2022-07-11 23:07:12,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2022-07-11 23:07:12,097 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 236 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:12,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 839 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 23:07:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-11 23:07:12,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2022-07-11 23:07:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 23:07:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-11 23:07:12,112 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2022-07-11 23:07:12,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:12,112 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-11 23:07:12,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-11 23:07:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-11 23:07:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-11 23:07:12,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:12,113 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:12,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-11 23:07:12,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-11 23:07:12,328 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:12,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 24 times [2022-07-11 23:07:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:12,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823351348] [2022-07-11 23:07:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:12,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:12,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823351348] [2022-07-11 23:07:12,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823351348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:12,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707799391] [2022-07-11 23:07:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:07:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:12,641 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:12,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-11 23:07:12,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-11 23:07:12,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:12,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:07:12,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:13,098 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 15 treesize of output 11 [2022-07-11 23:07:13,175 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:13,175 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 25 treesize of output 24 [2022-07-11 23:07:13,267 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:13,267 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 25 treesize of output 24 [2022-07-11 23:07:13,399 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 23 treesize of output 7 [2022-07-11 23:07:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-11 23:07:13,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:13,528 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 16 treesize of output 14 [2022-07-11 23:07:13,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-11 23:07:13,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707799391] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:13,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:13,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-07-11 23:07:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979632705] [2022-07-11 23:07:13,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:13,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-11 23:07:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-11 23:07:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 23:07:13,654 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-11 23:07:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:14,241 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2022-07-11 23:07:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-11 23:07:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) Word has length 115 [2022-07-11 23:07:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:14,243 INFO L225 Difference]: With dead ends: 153 [2022-07-11 23:07:14,243 INFO L226 Difference]: Without dead ends: 151 [2022-07-11 23:07:14,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-07-11 23:07:14,247 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:14,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 660 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1323 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-07-11 23:07:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-11 23:07:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2022-07-11 23:07:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 23:07:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-11 23:07:14,264 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 115 [2022-07-11 23:07:14,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:14,264 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-11 23:07:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-11 23:07:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-11 23:07:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-11 23:07:14,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:14,265 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:14,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-11 23:07:14,471 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 25 times [2022-07-11 23:07:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567684177] [2022-07-11 23:07:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:14,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-11 23:07:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567684177] [2022-07-11 23:07:14,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567684177] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848661318] [2022-07-11 23:07:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:07:14,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:14,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:14,603 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:14,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-11 23:07:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:14,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 23:07:14,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-11 23:07:14,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-11 23:07:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848661318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:14,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:14,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-11 23:07:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886333001] [2022-07-11 23:07:14,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:14,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 23:07:14,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 23:07:14,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-11 23:07:14,873 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-11 23:07:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:15,084 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-07-11 23:07:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:07:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2022-07-11 23:07:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:15,085 INFO L225 Difference]: With dead ends: 169 [2022-07-11 23:07:15,086 INFO L226 Difference]: Without dead ends: 129 [2022-07-11 23:07:15,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-11 23:07:15,088 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:15,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:07:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-11 23:07:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2022-07-11 23:07:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 23:07:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-11 23:07:15,114 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 115 [2022-07-11 23:07:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:15,115 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-11 23:07:15,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-11 23:07:15,115 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-11 23:07:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-11 23:07:15,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:15,116 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:15,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-11 23:07:15,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:15,331 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 26 times [2022-07-11 23:07:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:15,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785790998] [2022-07-11 23:07:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:15,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:15,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:15,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785790998] [2022-07-11 23:07:15,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785790998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:15,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366590635] [2022-07-11 23:07:15,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:07:15,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:15,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:15,650 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:15,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-11 23:07:15,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:07:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-11 23:07:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:16,077 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 15 treesize of output 11 [2022-07-11 23:07:16,222 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:16,222 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 27 treesize of output 26 [2022-07-11 23:07:16,442 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 23 treesize of output 7 [2022-07-11 23:07:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-11 23:07:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:16,554 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 16 treesize of output 14 [2022-07-11 23:07:16,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:16,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366590635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:16,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:16,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 48 [2022-07-11 23:07:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197442959] [2022-07-11 23:07:16,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 23:07:16,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 23:07:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2022-07-11 23:07:16,695 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-11 23:07:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:17,526 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2022-07-11 23:07:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-11 23:07:17,527 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 119 [2022-07-11 23:07:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:17,527 INFO L225 Difference]: With dead ends: 161 [2022-07-11 23:07:17,527 INFO L226 Difference]: Without dead ends: 159 [2022-07-11 23:07:17,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 229 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=318, Invalid=3842, Unknown=0, NotChecked=0, Total=4160 [2022-07-11 23:07:17,528 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:17,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1124 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1846 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-07-11 23:07:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-11 23:07:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2022-07-11 23:07:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 23:07:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-07-11 23:07:17,545 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 119 [2022-07-11 23:07:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:17,546 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-07-11 23:07:17,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-11 23:07:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-07-11 23:07:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-11 23:07:17,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:17,547 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:17,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:17,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:17,759 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:17,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 27 times [2022-07-11 23:07:17,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:17,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925675761] [2022-07-11 23:07:17,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:17,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925675761] [2022-07-11 23:07:18,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925675761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843566339] [2022-07-11 23:07:18,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:07:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:18,188 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:18,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-11 23:07:18,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-11 23:07:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:18,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:07:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:18,668 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 15 treesize of output 11 [2022-07-11 23:07:19,075 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:07:19,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2022-07-11 23:07:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 150 proven. 185 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:19,575 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 18 [2022-07-11 23:07:19,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:07:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 142 proven. 193 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:19,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843566339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:19,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:19,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-07-11 23:07:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510883505] [2022-07-11 23:07:19,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:19,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-11 23:07:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-11 23:07:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-07-11 23:07:19,998 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-11 23:07:21,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:21,603 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-07-11 23:07:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-11 23:07:21,604 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 123 [2022-07-11 23:07:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:21,604 INFO L225 Difference]: With dead ends: 160 [2022-07-11 23:07:21,604 INFO L226 Difference]: Without dead ends: 120 [2022-07-11 23:07:21,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1517, Invalid=13489, Unknown=0, NotChecked=0, Total=15006 [2022-07-11 23:07:21,606 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:21,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 616 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 779 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-07-11 23:07:21,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-11 23:07:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-11 23:07:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 23:07:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-07-11 23:07:21,627 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 123 [2022-07-11 23:07:21,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:21,627 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-07-11 23:07:21,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-11 23:07:21,627 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-07-11 23:07:21,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-11 23:07:21,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:21,628 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:21,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:21,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-11 23:07:21,847 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:21,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 28 times [2022-07-11 23:07:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:21,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318934603] [2022-07-11 23:07:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:22,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318934603] [2022-07-11 23:07:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318934603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747014058] [2022-07-11 23:07:22,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:07:22,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:22,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:22,284 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:22,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-11 23:07:22,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:07:22,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:22,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-11 23:07:22,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:22,747 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 15 treesize of output 11 [2022-07-11 23:07:22,813 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:22,813 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 25 treesize of output 24 [2022-07-11 23:07:22,912 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:22,912 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 25 treesize of output 24 [2022-07-11 23:07:23,067 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 23 treesize of output 7 [2022-07-11 23:07:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 98 proven. 318 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-11 23:07:23,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:23,235 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 16 treesize of output 14 [2022-07-11 23:07:23,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 320 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-07-11 23:07:23,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747014058] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:23,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:23,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-07-11 23:07:23,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453754126] [2022-07-11 23:07:23,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:23,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 23:07:23,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 23:07:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 23:07:23,355 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-11 23:07:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:23,958 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-07-11 23:07:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-11 23:07:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) Word has length 127 [2022-07-11 23:07:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:23,959 INFO L225 Difference]: With dead ends: 134 [2022-07-11 23:07:23,959 INFO L226 Difference]: Without dead ends: 132 [2022-07-11 23:07:23,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 244 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=3966, Unknown=0, NotChecked=0, Total=4290 [2022-07-11 23:07:23,960 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:23,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 903 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1935 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-07-11 23:07:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-11 23:07:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-11 23:07:23,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 23:07:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-07-11 23:07:23,979 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 127 [2022-07-11 23:07:23,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:23,979 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-07-11 23:07:23,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-11 23:07:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-07-11 23:07:23,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-11 23:07:23,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:23,980 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:23,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-11 23:07:24,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:24,187 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:24,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:24,188 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 29 times [2022-07-11 23:07:24,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:24,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081194017] [2022-07-11 23:07:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:24,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:24,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:24,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081194017] [2022-07-11 23:07:24,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081194017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:24,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155316374] [2022-07-11 23:07:24,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:07:24,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:24,562 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:24,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-11 23:07:24,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-11 23:07:24,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:24,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 23:07:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:25,094 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 23:07:25,274 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:25,274 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 27 treesize of output 26 [2022-07-11 23:07:25,501 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 23 treesize of output 7 [2022-07-11 23:07:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 68 proven. 348 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-11 23:07:25,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:25,650 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 16 treesize of output 14 [2022-07-11 23:07:25,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:25,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155316374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:25,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:25,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 52 [2022-07-11 23:07:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206189702] [2022-07-11 23:07:25,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 23:07:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 23:07:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2461, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 23:07:25,858 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-11 23:07:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:26,533 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-07-11 23:07:26,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-11 23:07:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 131 [2022-07-11 23:07:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:26,535 INFO L225 Difference]: With dead ends: 172 [2022-07-11 23:07:26,535 INFO L226 Difference]: Without dead ends: 170 [2022-07-11 23:07:26,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 260 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=4109, Unknown=0, NotChecked=0, Total=4422 [2022-07-11 23:07:26,536 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:26,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 663 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1646 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-07-11 23:07:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-11 23:07:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-07-11 23:07:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:07:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-07-11 23:07:26,556 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2022-07-11 23:07:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:26,557 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-07-11 23:07:26,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-11 23:07:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-07-11 23:07:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-11 23:07:26,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:26,558 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:26,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-11 23:07:26,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:26,775 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:26,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 30 times [2022-07-11 23:07:26,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:26,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61020176] [2022-07-11 23:07:26,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:26,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61020176] [2022-07-11 23:07:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61020176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201661818] [2022-07-11 23:07:27,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:07:27,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:27,126 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:27,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-11 23:07:27,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-11 23:07:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-11 23:07:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:27,715 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 15 treesize of output 11 [2022-07-11 23:07:28,361 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:07:28,361 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 25 treesize of output 12 [2022-07-11 23:07:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 186 proven. 226 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:28,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:29,073 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 21 treesize of output 19 [2022-07-11 23:07:29,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 38 [2022-07-11 23:07:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 93 proven. 319 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201661818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:29,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:29,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 80 [2022-07-11 23:07:29,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11662414] [2022-07-11 23:07:29,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:29,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-11 23:07:29,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-11 23:07:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=5668, Unknown=0, NotChecked=0, Total=6320 [2022-07-11 23:07:29,730 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:07:31,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:31,618 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-07-11 23:07:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-11 23:07:31,618 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 135 [2022-07-11 23:07:31,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:31,619 INFO L225 Difference]: With dead ends: 176 [2022-07-11 23:07:31,619 INFO L226 Difference]: Without dead ends: 132 [2022-07-11 23:07:31,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1737, Invalid=15819, Unknown=0, NotChecked=0, Total=17556 [2022-07-11 23:07:31,621 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:31,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1072 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1070 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-07-11 23:07:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-11 23:07:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-11 23:07:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:07:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-07-11 23:07:31,639 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 135 [2022-07-11 23:07:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:31,640 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-07-11 23:07:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:07:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-07-11 23:07:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-11 23:07:31,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:31,641 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:31,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:31,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-11 23:07:31,857 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1501516640, now seen corresponding path program 31 times [2022-07-11 23:07:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365162491] [2022-07-11 23:07:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:32,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 395 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:32,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365162491] [2022-07-11 23:07:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365162491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355153063] [2022-07-11 23:07:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:07:32,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:32,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:32,246 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:32,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-11 23:07:32,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-11 23:07:32,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:32,691 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 15 treesize of output 11 [2022-07-11 23:07:32,770 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:32,770 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 25 treesize of output 24 [2022-07-11 23:07:32,864 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:32,865 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 25 treesize of output 24 [2022-07-11 23:07:33,069 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 23 treesize of output 7 [2022-07-11 23:07:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 109 proven. 392 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-07-11 23:07:33,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:33,234 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 16 treesize of output 14 [2022-07-11 23:07:33,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 394 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-11 23:07:33,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355153063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:33,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:33,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-07-11 23:07:33,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505253921] [2022-07-11 23:07:33,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:33,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-11 23:07:33,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-11 23:07:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 23:07:33,435 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-11 23:07:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:34,028 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-07-11 23:07:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-11 23:07:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) Word has length 139 [2022-07-11 23:07:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:34,029 INFO L225 Difference]: With dead ends: 141 [2022-07-11 23:07:34,029 INFO L226 Difference]: Without dead ends: 139 [2022-07-11 23:07:34,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 276 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=4112, Unknown=0, NotChecked=0, Total=4422 [2022-07-11 23:07:34,030 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:34,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1004 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1918 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2022-07-11 23:07:34,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-11 23:07:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-07-11 23:07:34,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:07:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-07-11 23:07:34,058 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 139 [2022-07-11 23:07:34,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:34,058 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-07-11 23:07:34,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-11 23:07:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-07-11 23:07:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-11 23:07:34,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:34,061 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:34,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-11 23:07:34,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-11 23:07:34,275 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:34,276 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 32 times [2022-07-11 23:07:34,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:34,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336941161] [2022-07-11 23:07:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:34,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:34,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:34,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336941161] [2022-07-11 23:07:34,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336941161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153662324] [2022-07-11 23:07:34,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:07:34,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:34,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:34,619 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:34,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-11 23:07:34,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:07:34,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:34,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-11 23:07:34,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:35,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 23:07:35,229 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:35,229 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 27 treesize of output 26 [2022-07-11 23:07:35,464 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 23 treesize of output 7 [2022-07-11 23:07:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-11 23:07:35,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:35,629 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 16 treesize of output 14 [2022-07-11 23:07:35,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:35,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153662324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:35,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:35,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 56 [2022-07-11 23:07:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692349906] [2022-07-11 23:07:35,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:35,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-11 23:07:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:35,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-11 23:07:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2873, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 23:07:35,827 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-11 23:07:36,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:36,662 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-07-11 23:07:36,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 23:07:36,663 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 143 [2022-07-11 23:07:36,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:36,663 INFO L225 Difference]: With dead ends: 188 [2022-07-11 23:07:36,663 INFO L226 Difference]: Without dead ends: 186 [2022-07-11 23:07:36,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 285 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=4780, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 23:07:36,664 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 110 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:36,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1147 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1693 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-07-11 23:07:36,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-11 23:07:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-07-11 23:07:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 23:07:36,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-07-11 23:07:36,692 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 143 [2022-07-11 23:07:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:36,692 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-07-11 23:07:36,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-11 23:07:36,693 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-07-11 23:07:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-11 23:07:36,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:36,694 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:36,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:36,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-11 23:07:36,897 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:36,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1610023500, now seen corresponding path program 33 times [2022-07-11 23:07:36,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:36,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070204742] [2022-07-11 23:07:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:36,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:37,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:37,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070204742] [2022-07-11 23:07:37,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070204742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:37,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076545676] [2022-07-11 23:07:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:07:37,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:37,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:37,323 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:37,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-11 23:07:37,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-11 23:07:37,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:37,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-11 23:07:37,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:38,117 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 15 treesize of output 11 [2022-07-11 23:07:38,806 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:07:38,807 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 25 treesize of output 12 [2022-07-11 23:07:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 226 proven. 271 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:38,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:39,425 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 18 [2022-07-11 23:07:39,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:07:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 216 proven. 281 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:39,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076545676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:39,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:39,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 86 [2022-07-11 23:07:39,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806917888] [2022-07-11 23:07:39,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:39,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-11 23:07:39,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-11 23:07:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=6541, Unknown=0, NotChecked=0, Total=7310 [2022-07-11 23:07:39,916 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-11 23:07:41,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:41,784 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-07-11 23:07:41,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-11 23:07:41,785 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) Word has length 147 [2022-07-11 23:07:41,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:41,785 INFO L225 Difference]: With dead ends: 192 [2022-07-11 23:07:41,785 INFO L226 Difference]: Without dead ends: 144 [2022-07-11 23:07:41,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5628 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2016, Invalid=18576, Unknown=0, NotChecked=0, Total=20592 [2022-07-11 23:07:41,787 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:41,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1154 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1089 Invalid, 0 Unknown, 275 Unchecked, 0.3s Time] [2022-07-11 23:07:41,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-11 23:07:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-11 23:07:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 23:07:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-07-11 23:07:41,808 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 147 [2022-07-11 23:07:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:41,808 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-07-11 23:07:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-11 23:07:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-07-11 23:07:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-11 23:07:41,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:41,810 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:41,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:42,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:42,019 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash 799601049, now seen corresponding path program 34 times [2022-07-11 23:07:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128644771] [2022-07-11 23:07:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:07:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 477 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-11 23:07:42,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128644771] [2022-07-11 23:07:42,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128644771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:42,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863091074] [2022-07-11 23:07:42,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:07:42,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:42,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:42,476 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:42,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-11 23:07:42,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:07:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:42,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-11 23:07:42,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:43,060 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 15 treesize of output 11 [2022-07-11 23:07:43,127 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:43,128 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 25 treesize of output 24 [2022-07-11 23:07:43,219 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:07:43,219 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 25 treesize of output 24 [2022-07-11 23:07:43,504 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 23 treesize of output 7 [2022-07-11 23:07:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-07-11 23:07:43,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:43,664 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 16 treesize of output 14 [2022-07-11 23:07:43,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 476 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-11 23:07:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863091074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:43,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-07-11 23:07:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974731022] [2022-07-11 23:07:43,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-11 23:07:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:43,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-11 23:07:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2022-07-11 23:07:43,806 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-11 23:07:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:44,544 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-07-11 23:07:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-11 23:07:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) Word has length 151 [2022-07-11 23:07:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:44,560 INFO L225 Difference]: With dead ends: 158 [2022-07-11 23:07:44,560 INFO L226 Difference]: Without dead ends: 156 [2022-07-11 23:07:44,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 292 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=5328, Unknown=0, NotChecked=0, Total=5700 [2022-07-11 23:07:44,561 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 109 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:44,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1343 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2425 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-07-11 23:07:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-11 23:07:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-07-11 23:07:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 23:07:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-07-11 23:07:44,597 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 151 [2022-07-11 23:07:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:44,598 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-07-11 23:07:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-11 23:07:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-07-11 23:07:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-11 23:07:44,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:44,599 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:44,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:44,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-11 23:07:44,815 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1897314831, now seen corresponding path program 35 times [2022-07-11 23:07:44,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300006689] [2022-07-11 23:07:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:44,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:45,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:07:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-11 23:07:45,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300006689] [2022-07-11 23:07:45,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300006689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:45,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830766503] [2022-07-11 23:07:45,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:07:45,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:45,266 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:45,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-11 23:07:45,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-11 23:07:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-11 23:07:45,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:45,794 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 15 treesize of output 11 [2022-07-11 23:07:45,917 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:07:45,918 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 27 treesize of output 26 [2022-07-11 23:07:46,177 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 23 treesize of output 7 [2022-07-11 23:07:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:46,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:07:46,368 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 16 treesize of output 14 [2022-07-11 23:07:46,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:07:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-11 23:07:46,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830766503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:07:46,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:07:46,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 60 [2022-07-11 23:07:46,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075046980] [2022-07-11 23:07:46,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:07:46,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-11 23:07:46,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:07:46,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-11 23:07:46,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2022-07-11 23:07:46,587 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-11 23:07:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:07:47,627 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2022-07-11 23:07:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-11 23:07:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 155 [2022-07-11 23:07:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:07:47,628 INFO L225 Difference]: With dead ends: 209 [2022-07-11 23:07:47,629 INFO L226 Difference]: Without dead ends: 207 [2022-07-11 23:07:47,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=390, Invalid=5930, Unknown=0, NotChecked=0, Total=6320 [2022-07-11 23:07:47,629 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:07:47,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1327 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2425 Invalid, 0 Unknown, 185 Unchecked, 0.7s Time] [2022-07-11 23:07:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-11 23:07:47,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-07-11 23:07:47,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-11 23:07:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-07-11 23:07:47,654 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 155 [2022-07-11 23:07:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:07:47,655 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-07-11 23:07:47,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-11 23:07:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-07-11 23:07:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-11 23:07:47,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:07:47,656 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:07:47,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-11 23:07:47,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-11 23:07:47,871 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:07:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:07:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1021269893, now seen corresponding path program 36 times [2022-07-11 23:07:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:07:47,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185378833] [2022-07-11 23:07:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:07:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:07:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:07:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:07:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:07:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:07:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:07:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:07:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:07:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:07:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:07:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:07:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:07:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:07:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:07:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:07:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:07:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-11 23:07:48,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:07:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185378833] [2022-07-11 23:07:48,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185378833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:07:48,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606190842] [2022-07-11 23:07:48,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:07:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:07:48,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:07:48,514 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:07:48,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-11 23:07:48,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-11 23:07:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:07:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-11 23:07:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:07:49,100 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 15 treesize of output 11 [2022-07-11 23:07:50,332 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 12))) is different from true [2022-07-11 23:07:55,710 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-11 23:07:55,710 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 28 treesize of output 27 [2022-07-11 23:07:56,700 INFO L356 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2022-07-11 23:07:56,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2022-07-11 23:07:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 319 proven. 317 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-11 23:07:56,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:00,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606190842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:00,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 69 [2022-07-11 23:08:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205623844] [2022-07-11 23:08:00,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-11 23:08:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-11 23:08:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6455, Unknown=6, NotChecked=166, Total=7310 [2022-07-11 23:08:00,455 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-11 23:08:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:04,685 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-07-11 23:08:04,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-11 23:08:04,685 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) Word has length 159 [2022-07-11 23:08:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:04,686 INFO L225 Difference]: With dead ends: 225 [2022-07-11 23:08:04,686 INFO L226 Difference]: Without dead ends: 173 [2022-07-11 23:08:04,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9449 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2493, Invalid=27261, Unknown=6, NotChecked=342, Total=30102 [2022-07-11 23:08:04,689 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 255 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:04,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 2053 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2353 Invalid, 0 Unknown, 442 Unchecked, 0.9s Time] [2022-07-11 23:08:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-11 23:08:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-07-11 23:08:04,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-11 23:08:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-07-11 23:08:04,717 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 159 [2022-07-11 23:08:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:04,717 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-07-11 23:08:04,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-11 23:08:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-07-11 23:08:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-11 23:08:04,718 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:04,718 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:04,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:04,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:04,927 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:04,927 INFO L85 PathProgramCache]: Analyzing trace with hash -827326766, now seen corresponding path program 37 times [2022-07-11 23:08:04,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:04,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818030764] [2022-07-11 23:08:04,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:04,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:05,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 567 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-11 23:08:05,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818030764] [2022-07-11 23:08:05,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818030764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:05,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356784109] [2022-07-11 23:08:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:08:05,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:05,382 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:05,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-11 23:08:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:05,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-11 23:08:05,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:06,036 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 15 treesize of output 11 [2022-07-11 23:08:06,126 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:06,126 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 25 treesize of output 24 [2022-07-11 23:08:06,209 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:06,209 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 25 treesize of output 24 [2022-07-11 23:08:06,459 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 23 treesize of output 7 [2022-07-11 23:08:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 131 proven. 564 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-11 23:08:06,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:06,685 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 16 treesize of output 14 [2022-07-11 23:08:06,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-11 23:08:06,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356784109] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:06,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:06,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-07-11 23:08:06,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201001362] [2022-07-11 23:08:06,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-11 23:08:06,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:06,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-11 23:08:06,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2022-07-11 23:08:06,863 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-11 23:08:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:07,872 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-11 23:08:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-11 23:08:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) Word has length 163 [2022-07-11 23:08:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:07,873 INFO L225 Difference]: With dead ends: 170 [2022-07-11 23:08:07,873 INFO L226 Difference]: Without dead ends: 168 [2022-07-11 23:08:07,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 317 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=6084, Unknown=0, NotChecked=0, Total=6480 [2022-07-11 23:08:07,874 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 127 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:07,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1728 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3296 Invalid, 0 Unknown, 88 Unchecked, 0.8s Time] [2022-07-11 23:08:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-11 23:08:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-07-11 23:08:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-11 23:08:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-07-11 23:08:07,901 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 163 [2022-07-11 23:08:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:07,902 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-07-11 23:08:07,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-11 23:08:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-07-11 23:08:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-11 23:08:07,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:07,903 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:07,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-11 23:08:08,122 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash -286096696, now seen corresponding path program 38 times [2022-07-11 23:08:08,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:08,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104687962] [2022-07-11 23:08:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:08,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:08,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 39 proven. 606 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-11 23:08:08,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:08,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104687962] [2022-07-11 23:08:08,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104687962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:08,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52073027] [2022-07-11 23:08:08,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:08:08,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:08,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:08,898 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-11 23:08:09,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:08:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-11 23:08:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:09,525 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 15 treesize of output 11 [2022-07-11 23:08:09,651 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:09,652 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 25 treesize of output 24 [2022-07-11 23:08:10,037 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 23:08:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 89 proven. 606 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-11 23:08:10,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52073027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:10,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 66 [2022-07-11 23:08:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889697734] [2022-07-11 23:08:10,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:10,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-11 23:08:10,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-11 23:08:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=5806, Unknown=0, NotChecked=0, Total=6162 [2022-07-11 23:08:10,479 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-11 23:08:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:12,325 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-07-11 23:08:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-11 23:08:12,325 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 167 [2022-07-11 23:08:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:12,326 INFO L225 Difference]: With dead ends: 233 [2022-07-11 23:08:12,326 INFO L226 Difference]: Without dead ends: 231 [2022-07-11 23:08:12,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2022-07-11 23:08:12,329 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 225 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:12,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1654 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3704 Invalid, 0 Unknown, 82 Unchecked, 1.0s Time] [2022-07-11 23:08:12,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-11 23:08:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2022-07-11 23:08:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-11 23:08:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-07-11 23:08:12,359 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 167 [2022-07-11 23:08:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:12,361 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-07-11 23:08:12,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-11 23:08:12,361 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-07-11 23:08:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-11 23:08:12,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:12,362 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:12,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-11 23:08:12,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:12,579 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:12,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1640373182, now seen corresponding path program 39 times [2022-07-11 23:08:12,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:12,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534258168] [2022-07-11 23:08:12,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:12,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:13,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-11 23:08:13,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534258168] [2022-07-11 23:08:13,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534258168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891300306] [2022-07-11 23:08:13,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:08:13,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:13,137 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:13,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-11 23:08:13,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-11 23:08:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:13,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-11 23:08:13,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:13,962 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 15 treesize of output 11 [2022-07-11 23:08:14,659 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-11 23:08:14,659 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 21 treesize of output 10 [2022-07-11 23:08:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-11 23:08:14,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:15,480 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 16 treesize of output 14 [2022-07-11 23:08:15,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:15,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891300306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:15,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:15,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 66 [2022-07-11 23:08:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861507006] [2022-07-11 23:08:15,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-11 23:08:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-11 23:08:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=6395, Unknown=0, NotChecked=0, Total=6972 [2022-07-11 23:08:15,585 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-11 23:08:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:16,167 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-07-11 23:08:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 23:08:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) Word has length 171 [2022-07-11 23:08:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:16,168 INFO L225 Difference]: With dead ends: 223 [2022-07-11 23:08:16,168 INFO L226 Difference]: Without dead ends: 221 [2022-07-11 23:08:16,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=609, Invalid=6873, Unknown=0, NotChecked=0, Total=7482 [2022-07-11 23:08:16,169 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:16,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1124 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1795 Invalid, 0 Unknown, 222 Unchecked, 0.4s Time] [2022-07-11 23:08:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-11 23:08:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2022-07-11 23:08:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-11 23:08:16,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-11 23:08:16,201 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2022-07-11 23:08:16,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:16,201 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-11 23:08:16,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-11 23:08:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-11 23:08:16,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-11 23:08:16,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:16,202 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:16,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:16,420 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash 714324747, now seen corresponding path program 40 times [2022-07-11 23:08:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134902011] [2022-07-11 23:08:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:16,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 39 proven. 665 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:16,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134902011] [2022-07-11 23:08:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134902011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:16,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850311151] [2022-07-11 23:08:16,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:08:16,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:16,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:16,930 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:16,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-11 23:08:17,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:08:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-11 23:08:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:17,588 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 15 treesize of output 11 [2022-07-11 23:08:17,712 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:17,712 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 25 treesize of output 24 [2022-07-11 23:08:17,813 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:17,813 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 25 treesize of output 24 [2022-07-11 23:08:18,252 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 23:08:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 142 proven. 662 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-11 23:08:18,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:18,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850311151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:18,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:18,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 67 [2022-07-11 23:08:18,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347045592] [2022-07-11 23:08:18,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:18,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-11 23:08:18,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:18,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-11 23:08:18,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5953, Unknown=0, NotChecked=0, Total=6320 [2022-07-11 23:08:18,756 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-11 23:08:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:20,548 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2022-07-11 23:08:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 23:08:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 175 [2022-07-11 23:08:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:20,549 INFO L225 Difference]: With dead ends: 233 [2022-07-11 23:08:20,549 INFO L226 Difference]: Without dead ends: 231 [2022-07-11 23:08:20,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=731, Invalid=12609, Unknown=0, NotChecked=0, Total=13340 [2022-07-11 23:08:20,550 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 177 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:20,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1533 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3677 Invalid, 0 Unknown, 78 Unchecked, 1.0s Time] [2022-07-11 23:08:20,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-11 23:08:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-07-11 23:08:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-11 23:08:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-11 23:08:20,583 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 175 [2022-07-11 23:08:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:20,583 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-11 23:08:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-11 23:08:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-11 23:08:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-11 23:08:20,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:20,584 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:20,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:20,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-11 23:08:20,799 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:20,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1634186828, now seen corresponding path program 41 times [2022-07-11 23:08:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143367123] [2022-07-11 23:08:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-11 23:08:20,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:20,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143367123] [2022-07-11 23:08:20,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143367123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984438395] [2022-07-11 23:08:20,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:08:20,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:20,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:20,983 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:20,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-11 23:08:21,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-11 23:08:21,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-11 23:08:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-11 23:08:21,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:21,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-11 23:08:21,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984438395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:21,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:21,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-11 23:08:21,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870875033] [2022-07-11 23:08:21,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:21,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-11 23:08:21,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-11 23:08:21,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 23:08:21,579 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-11 23:08:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:21,846 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-07-11 23:08:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 23:08:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 175 [2022-07-11 23:08:21,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:21,854 INFO L225 Difference]: With dead ends: 249 [2022-07-11 23:08:21,854 INFO L226 Difference]: Without dead ends: 189 [2022-07-11 23:08:21,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-07-11 23:08:21,855 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 324 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:21,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 353 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-11 23:08:21,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2022-07-11 23:08:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-11 23:08:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-07-11 23:08:21,905 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 175 [2022-07-11 23:08:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:21,905 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-07-11 23:08:21,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-11 23:08:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-07-11 23:08:21,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-11 23:08:21,906 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:21,906 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:21,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:22,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-11 23:08:22,127 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:22,128 INFO L85 PathProgramCache]: Analyzing trace with hash -38045055, now seen corresponding path program 42 times [2022-07-11 23:08:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:22,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760161662] [2022-07-11 23:08:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:22,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760161662] [2022-07-11 23:08:22,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760161662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:22,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462422700] [2022-07-11 23:08:22,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:08:22,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:22,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:22,534 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:22,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-11 23:08:22,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-11 23:08:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:22,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-11 23:08:22,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:23,617 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 15 treesize of output 11 [2022-07-11 23:08:23,788 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:08:23,789 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 27 treesize of output 26 [2022-07-11 23:08:24,150 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 23 treesize of output 7 [2022-07-11 23:08:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 96 proven. 708 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-11 23:08:24,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:24,333 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 16 treesize of output 14 [2022-07-11 23:08:24,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:24,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462422700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:24,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:24,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 68 [2022-07-11 23:08:24,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89206183] [2022-07-11 23:08:24,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:24,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-11 23:08:24,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:24,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-11 23:08:24,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4301, Unknown=0, NotChecked=0, Total=4556 [2022-07-11 23:08:24,591 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-11 23:08:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:26,045 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-07-11 23:08:26,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-11 23:08:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 179 [2022-07-11 23:08:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:26,046 INFO L225 Difference]: With dead ends: 241 [2022-07-11 23:08:26,046 INFO L226 Difference]: Without dead ends: 239 [2022-07-11 23:08:26,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 349 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=438, Invalid=7572, Unknown=0, NotChecked=0, Total=8010 [2022-07-11 23:08:26,047 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 107 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:26,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1842 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3492 Invalid, 0 Unknown, 82 Unchecked, 1.1s Time] [2022-07-11 23:08:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-11 23:08:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 185. [2022-07-11 23:08:26,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-11 23:08:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-07-11 23:08:26,085 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 179 [2022-07-11 23:08:26,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:26,085 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-07-11 23:08:26,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-11 23:08:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-07-11 23:08:26,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-11 23:08:26,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:26,086 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:26,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:26,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-11 23:08:26,293 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:26,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1869254391, now seen corresponding path program 43 times [2022-07-11 23:08:26,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:26,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475635344] [2022-07-11 23:08:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:26,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475635344] [2022-07-11 23:08:26,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475635344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:26,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142531542] [2022-07-11 23:08:26,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:08:26,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:26,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:26,863 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:26,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-11 23:08:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:27,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-11 23:08:27,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:27,725 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 23:08:28,123 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 23 treesize of output 7 [2022-07-11 23:08:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:28,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:28,243 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 16 treesize of output 14 [2022-07-11 23:08:28,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:28,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142531542] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:28,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:28,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 68 [2022-07-11 23:08:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782164943] [2022-07-11 23:08:28,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:28,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-11 23:08:28,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-11 23:08:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4330, Unknown=0, NotChecked=0, Total=4556 [2022-07-11 23:08:28,421 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-11 23:08:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:30,675 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2022-07-11 23:08:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-11 23:08:30,675 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 183 [2022-07-11 23:08:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:30,676 INFO L225 Difference]: With dead ends: 262 [2022-07-11 23:08:30,676 INFO L226 Difference]: Without dead ends: 260 [2022-07-11 23:08:30,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 361 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=739, Invalid=12601, Unknown=0, NotChecked=0, Total=13340 [2022-07-11 23:08:30,678 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:30,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2440 Invalid, 4907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 23:08:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-11 23:08:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2022-07-11 23:08:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-11 23:08:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-11 23:08:30,719 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 183 [2022-07-11 23:08:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:30,719 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-11 23:08:30,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-11 23:08:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-11 23:08:30,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-11 23:08:30,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:30,720 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:30,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:30,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:30,933 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:30,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:30,934 INFO L85 PathProgramCache]: Analyzing trace with hash -443324860, now seen corresponding path program 44 times [2022-07-11 23:08:30,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082849851] [2022-07-11 23:08:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:31,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 771 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:31,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082849851] [2022-07-11 23:08:31,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082849851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:31,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036740827] [2022-07-11 23:08:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:08:31,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:31,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:31,564 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:31,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-11 23:08:31,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:08:31,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-11 23:08:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:32,193 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 15 treesize of output 11 [2022-07-11 23:08:32,280 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:32,281 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 25 treesize of output 24 [2022-07-11 23:08:32,402 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:32,403 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 25 treesize of output 24 [2022-07-11 23:08:32,749 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 23 treesize of output 7 [2022-07-11 23:08:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-11 23:08:32,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:32,972 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 16 treesize of output 14 [2022-07-11 23:08:32,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 770 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-11 23:08:33,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036740827] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:33,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:33,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-07-11 23:08:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351658244] [2022-07-11 23:08:33,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-11 23:08:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-11 23:08:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4699, Unknown=0, NotChecked=0, Total=4970 [2022-07-11 23:08:33,299 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-11 23:08:34,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:34,716 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2022-07-11 23:08:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-11 23:08:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) Word has length 187 [2022-07-11 23:08:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:34,718 INFO L225 Difference]: With dead ends: 249 [2022-07-11 23:08:34,718 INFO L226 Difference]: Without dead ends: 247 [2022-07-11 23:08:34,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 374 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=455, Invalid=8101, Unknown=0, NotChecked=0, Total=8556 [2022-07-11 23:08:34,719 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:34,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1794 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4013 Invalid, 0 Unknown, 117 Unchecked, 1.0s Time] [2022-07-11 23:08:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-11 23:08:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 189. [2022-07-11 23:08:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-11 23:08:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-11 23:08:34,820 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 187 [2022-07-11 23:08:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:34,820 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-11 23:08:34,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-11 23:08:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-11 23:08:34,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-11 23:08:34,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:34,821 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:34,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:35,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-11 23:08:35,035 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1846642579, now seen corresponding path program 45 times [2022-07-11 23:08:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559658054] [2022-07-11 23:08:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:35,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-11 23:08:35,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559658054] [2022-07-11 23:08:35,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559658054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:35,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817310294] [2022-07-11 23:08:35,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:08:35,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:35,272 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:35,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-11 23:08:35,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-11 23:08:35,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:35,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-11 23:08:35,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-11 23:08:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-11 23:08:36,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817310294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:36,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-11 23:08:36,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62387987] [2022-07-11 23:08:36,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:36,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-11 23:08:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-11 23:08:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 23:08:36,255 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-11 23:08:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:36,522 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2022-07-11 23:08:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-11 23:08:36,522 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 187 [2022-07-11 23:08:36,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:36,523 INFO L225 Difference]: With dead ends: 265 [2022-07-11 23:08:36,523 INFO L226 Difference]: Without dead ends: 201 [2022-07-11 23:08:36,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-11 23:08:36,524 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 375 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:36,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 319 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-11 23:08:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2022-07-11 23:08:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-11 23:08:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-07-11 23:08:36,600 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 187 [2022-07-11 23:08:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:36,601 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-07-11 23:08:36,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-11 23:08:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-07-11 23:08:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-11 23:08:36,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:36,602 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:36,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:36,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-11 23:08:36,820 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:36,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1911496390, now seen corresponding path program 46 times [2022-07-11 23:08:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:36,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560310441] [2022-07-11 23:08:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:36,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:37,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560310441] [2022-07-11 23:08:37,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560310441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:37,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249794780] [2022-07-11 23:08:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:08:37,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:37,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:37,305 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:37,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-11 23:08:37,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:08:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:37,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-11 23:08:37,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:37,965 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 15 treesize of output 11 [2022-07-11 23:08:38,115 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:08:38,115 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 27 treesize of output 26 [2022-07-11 23:08:38,502 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 23 treesize of output 7 [2022-07-11 23:08:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 103 proven. 818 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-11 23:08:38,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:38,662 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 16 treesize of output 14 [2022-07-11 23:08:38,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:38,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249794780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:38,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:38,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 72 [2022-07-11 23:08:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466110878] [2022-07-11 23:08:38,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-11 23:08:38,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-11 23:08:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 23:08:38,892 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:08:40,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:40,218 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2022-07-11 23:08:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-11 23:08:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 191 [2022-07-11 23:08:40,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:40,219 INFO L225 Difference]: With dead ends: 257 [2022-07-11 23:08:40,219 INFO L226 Difference]: Without dead ends: 255 [2022-07-11 23:08:40,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2723 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=462, Invalid=8468, Unknown=0, NotChecked=0, Total=8930 [2022-07-11 23:08:40,220 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 111 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:40,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2248 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4302 Invalid, 0 Unknown, 132 Unchecked, 1.0s Time] [2022-07-11 23:08:40,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-11 23:08:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 197. [2022-07-11 23:08:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-11 23:08:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2022-07-11 23:08:40,284 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 191 [2022-07-11 23:08:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:40,284 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2022-07-11 23:08:40,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:08:40,285 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2022-07-11 23:08:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-11 23:08:40,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:40,286 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:40,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:40,503 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1959522608, now seen corresponding path program 47 times [2022-07-11 23:08:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:40,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399743087] [2022-07-11 23:08:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:40,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:41,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399743087] [2022-07-11 23:08:41,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399743087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:41,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034961719] [2022-07-11 23:08:41,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:08:41,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:41,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:41,108 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:41,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-11 23:08:41,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-11 23:08:41,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:41,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-11 23:08:41,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:42,137 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 23:08:42,609 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 23 treesize of output 7 [2022-07-11 23:08:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:42,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:42,788 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 16 treesize of output 14 [2022-07-11 23:08:42,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:42,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034961719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:42,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:42,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 72 [2022-07-11 23:08:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465860699] [2022-07-11 23:08:42,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:42,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-11 23:08:42,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-11 23:08:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 23:08:42,982 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:08:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:45,058 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2022-07-11 23:08:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-11 23:08:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 195 [2022-07-11 23:08:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:45,059 INFO L225 Difference]: With dead ends: 278 [2022-07-11 23:08:45,059 INFO L226 Difference]: Without dead ends: 276 [2022-07-11 23:08:45,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4072 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=786, Invalid=14220, Unknown=0, NotChecked=0, Total=15006 [2022-07-11 23:08:45,062 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 359 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 4994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:45,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2084 Invalid, 4994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4674 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-11 23:08:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-11 23:08:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2022-07-11 23:08:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-11 23:08:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-11 23:08:45,111 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 195 [2022-07-11 23:08:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:45,111 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-11 23:08:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-11 23:08:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-11 23:08:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-11 23:08:45,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:45,112 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:45,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-11 23:08:45,331 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1613643901, now seen corresponding path program 48 times [2022-07-11 23:08:45,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:45,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638570076] [2022-07-11 23:08:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:45,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:08:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 885 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:08:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638570076] [2022-07-11 23:08:45,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638570076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:45,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914380677] [2022-07-11 23:08:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:08:45,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:45,983 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:45,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-11 23:08:46,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-11 23:08:46,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:46,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-11 23:08:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:47,043 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 15 treesize of output 11 [2022-07-11 23:08:47,116 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:47,117 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 25 treesize of output 24 [2022-07-11 23:08:47,205 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:08:47,206 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 25 treesize of output 24 [2022-07-11 23:08:47,567 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 23 treesize of output 7 [2022-07-11 23:08:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 164 proven. 882 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-11 23:08:47,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:47,772 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 16 treesize of output 14 [2022-07-11 23:08:47,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 884 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-11 23:08:47,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914380677] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:47,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:47,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2022-07-11 23:08:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620678690] [2022-07-11 23:08:47,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:47,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-11 23:08:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-11 23:08:47,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4978, Unknown=0, NotChecked=0, Total=5256 [2022-07-11 23:08:47,974 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-11 23:08:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:49,446 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-07-11 23:08:49,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-11 23:08:49,447 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) Word has length 199 [2022-07-11 23:08:49,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:49,448 INFO L225 Difference]: With dead ends: 265 [2022-07-11 23:08:49,448 INFO L226 Difference]: Without dead ends: 263 [2022-07-11 23:08:49,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=468, Invalid=8652, Unknown=0, NotChecked=0, Total=9120 [2022-07-11 23:08:49,449 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 173 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 4163 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:49,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1588 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4163 Invalid, 0 Unknown, 66 Unchecked, 1.1s Time] [2022-07-11 23:08:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-11 23:08:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2022-07-11 23:08:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-11 23:08:49,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-11 23:08:49,507 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 199 [2022-07-11 23:08:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:49,507 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-11 23:08:49,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-11 23:08:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-11 23:08:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-11 23:08:49,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:49,508 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:49,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:49,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:49,726 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1727141414, now seen corresponding path program 49 times [2022-07-11 23:08:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439405696] [2022-07-11 23:08:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:50,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-11 23:08:50,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439405696] [2022-07-11 23:08:50,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439405696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:50,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104676764] [2022-07-11 23:08:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:08:50,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:50,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:50,073 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:50,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-11 23:08:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:50,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 23:08:50,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-11 23:08:50,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-11 23:08:50,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104676764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:50,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-11 23:08:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272391378] [2022-07-11 23:08:50,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:50,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-11 23:08:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-11 23:08:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 23:08:50,675 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-11 23:08:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:50,964 INFO L93 Difference]: Finished difference Result 281 states and 286 transitions. [2022-07-11 23:08:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 23:08:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 199 [2022-07-11 23:08:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:50,966 INFO L225 Difference]: With dead ends: 281 [2022-07-11 23:08:50,966 INFO L226 Difference]: Without dead ends: 213 [2022-07-11 23:08:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-11 23:08:50,966 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 316 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:50,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 326 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-11 23:08:51,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2022-07-11 23:08:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-11 23:08:51,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-07-11 23:08:51,013 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 199 [2022-07-11 23:08:51,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:51,014 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-07-11 23:08:51,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-11 23:08:51,014 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-07-11 23:08:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-11 23:08:51,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:51,015 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:51,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:51,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-11 23:08:51,232 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash 785512179, now seen corresponding path program 50 times [2022-07-11 23:08:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:51,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476616791] [2022-07-11 23:08:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:08:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:08:51,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476616791] [2022-07-11 23:08:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476616791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734405620] [2022-07-11 23:08:51,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:08:51,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:51,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:51,741 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:51,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-11 23:08:51,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:08:51,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:51,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-11 23:08:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:52,702 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 15 treesize of output 11 [2022-07-11 23:08:52,898 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:08:52,898 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 27 treesize of output 26 [2022-07-11 23:08:53,440 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 23 treesize of output 7 [2022-07-11 23:08:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 110 proven. 936 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-11 23:08:53,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:53,682 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 16 treesize of output 14 [2022-07-11 23:08:53,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:08:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:08:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734405620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:53,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:53,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 76 [2022-07-11 23:08:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335607663] [2022-07-11 23:08:53,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-11 23:08:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-11 23:08:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5413, Unknown=0, NotChecked=0, Total=5700 [2022-07-11 23:08:53,956 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-11 23:08:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:55,176 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-07-11 23:08:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-11 23:08:55,176 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 203 [2022-07-11 23:08:55,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:55,177 INFO L225 Difference]: With dead ends: 268 [2022-07-11 23:08:55,177 INFO L226 Difference]: Without dead ends: 266 [2022-07-11 23:08:55,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 410 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=452, Invalid=8860, Unknown=0, NotChecked=0, Total=9312 [2022-07-11 23:08:55,178 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:55,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1827 Invalid, 4155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3970 Invalid, 0 Unknown, 116 Unchecked, 0.9s Time] [2022-07-11 23:08:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-11 23:08:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-07-11 23:08:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-11 23:08:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2022-07-11 23:08:55,247 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 203 [2022-07-11 23:08:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:55,247 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2022-07-11 23:08:55,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-11 23:08:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2022-07-11 23:08:55,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-11 23:08:55,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:55,263 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:55,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:55,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-11 23:08:55,463 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:55,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -14056855, now seen corresponding path program 51 times [2022-07-11 23:08:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:55,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868054688] [2022-07-11 23:08:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:55,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:55,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:55,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:08:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:08:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:08:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:08:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:08:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:08:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:08:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:08:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:08:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:08:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:08:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:08:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:08:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:08:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:08:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:08:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:08:56,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:56,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868054688] [2022-07-11 23:08:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868054688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887514721] [2022-07-11 23:08:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:08:56,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:56,050 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:08:56,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-11 23:08:57,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-11 23:08:57,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:57,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-11 23:08:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:57,701 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 15 treesize of output 11 [2022-07-11 23:08:58,570 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:08:58,570 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 25 treesize of output 12 [2022-07-11 23:08:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 486 proven. 556 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:08:58,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:59,696 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 18 [2022-07-11 23:08:59,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:09:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 471 proven. 571 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:09:00,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887514721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:00,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:00,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 116 [2022-07-11 23:09:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564046422] [2022-07-11 23:09:00,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:00,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-11 23:09:00,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-11 23:09:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=11971, Unknown=0, NotChecked=0, Total=13340 [2022-07-11 23:09:00,524 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-11 23:09:03,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:03,870 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-11 23:09:03,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-11 23:09:03,871 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 207 [2022-07-11 23:09:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:03,872 INFO L225 Difference]: With dead ends: 272 [2022-07-11 23:09:03,872 INFO L226 Difference]: Without dead ends: 204 [2022-07-11 23:09:03,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3576, Invalid=35826, Unknown=0, NotChecked=0, Total=39402 [2022-07-11 23:09:03,875 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 153 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:03,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1511 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1903 Invalid, 0 Unknown, 382 Unchecked, 0.5s Time] [2022-07-11 23:09:03,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-11 23:09:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-11 23:09:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-11 23:09:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-07-11 23:09:03,951 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 207 [2022-07-11 23:09:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:03,952 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-07-11 23:09:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-11 23:09:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-07-11 23:09:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-11 23:09:03,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:03,953 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:03,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:04,173 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash -920417866, now seen corresponding path program 52 times [2022-07-11 23:09:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:04,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208003866] [2022-07-11 23:09:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:04,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1007 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:04,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208003866] [2022-07-11 23:09:04,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208003866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:04,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16959023] [2022-07-11 23:09:04,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:09:04,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:04,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:04,752 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:04,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-11 23:09:05,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:09:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-11 23:09:05,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:05,654 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 15 treesize of output 11 [2022-07-11 23:09:05,761 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:05,762 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 25 treesize of output 24 [2022-07-11 23:09:05,888 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:05,888 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 25 treesize of output 24 [2022-07-11 23:09:06,510 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 23 treesize of output 7 [2022-07-11 23:09:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 175 proven. 1004 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-07-11 23:09:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:06,830 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 16 treesize of output 14 [2022-07-11 23:09:06,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:09:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1006 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-11 23:09:07,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16959023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:07,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:07,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2022-07-11 23:09:07,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284045754] [2022-07-11 23:09:07,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:07,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-11 23:09:07,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:07,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-11 23:09:07,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5558, Unknown=0, NotChecked=0, Total=5852 [2022-07-11 23:09:07,139 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-11 23:09:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:08,760 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-07-11 23:09:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-11 23:09:08,761 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) Word has length 211 [2022-07-11 23:09:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:08,762 INFO L225 Difference]: With dead ends: 218 [2022-07-11 23:09:08,762 INFO L226 Difference]: Without dead ends: 216 [2022-07-11 23:09:08,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 413 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=492, Invalid=9608, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 23:09:08,763 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 181 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:08,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2359 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 4362 Invalid, 0 Unknown, 103 Unchecked, 1.2s Time] [2022-07-11 23:09:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-11 23:09:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-11 23:09:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-11 23:09:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-07-11 23:09:08,817 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 211 [2022-07-11 23:09:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:08,817 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-07-11 23:09:08,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-11 23:09:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-07-11 23:09:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-11 23:09:08,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:08,819 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:08,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:09,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:09,028 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash 488504236, now seen corresponding path program 53 times [2022-07-11 23:09:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452981443] [2022-07-11 23:09:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:09,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452981443] [2022-07-11 23:09:09,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452981443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740927078] [2022-07-11 23:09:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:09:09,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:09,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:09,751 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:09,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-11 23:09:10,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-11 23:09:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:10,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-11 23:09:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:10,789 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 15 treesize of output 11 [2022-07-11 23:09:10,980 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:09:10,981 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 27 treesize of output 26 [2022-07-11 23:09:11,458 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 23 treesize of output 7 [2022-07-11 23:09:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 117 proven. 1062 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-11 23:09:11,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:11,683 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 16 treesize of output 14 [2022-07-11 23:09:11,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:09:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:11,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740927078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:11,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:11,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 80 [2022-07-11 23:09:11,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178187794] [2022-07-11 23:09:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:11,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-11 23:09:11,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-11 23:09:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6017, Unknown=0, NotChecked=0, Total=6320 [2022-07-11 23:09:11,992 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-11 23:09:13,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:13,864 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-07-11 23:09:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-11 23:09:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) Word has length 215 [2022-07-11 23:09:13,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:13,865 INFO L225 Difference]: With dead ends: 295 [2022-07-11 23:09:13,865 INFO L226 Difference]: Without dead ends: 293 [2022-07-11 23:09:13,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=534, Invalid=10386, Unknown=0, NotChecked=0, Total=10920 [2022-07-11 23:09:13,866 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 131 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:13,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 2835 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5126 Invalid, 0 Unknown, 123 Unchecked, 1.4s Time] [2022-07-11 23:09:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-11 23:09:13,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 221. [2022-07-11 23:09:13,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-11 23:09:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-07-11 23:09:13,930 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 215 [2022-07-11 23:09:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:13,931 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-07-11 23:09:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-11 23:09:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-07-11 23:09:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-11 23:09:13,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:13,932 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:13,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:14,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:14,150 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash 704807586, now seen corresponding path program 54 times [2022-07-11 23:09:14,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:14,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529518113] [2022-07-11 23:09:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:14,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:14,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529518113] [2022-07-11 23:09:14,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529518113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:14,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923760625] [2022-07-11 23:09:14,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:09:14,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:14,868 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:14,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-11 23:09:15,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-11 23:09:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:15,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-11 23:09:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:16,484 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 15 treesize of output 11 [2022-07-11 23:09:17,598 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:09:17,599 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 25 treesize of output 12 [2022-07-11 23:09:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 550 proven. 625 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:17,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:18,875 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 18 [2022-07-11 23:09:18,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:09:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 534 proven. 641 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:19,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923760625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:19,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:19,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2022-07-11 23:09:19,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788589036] [2022-07-11 23:09:19,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:19,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-11 23:09:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-11 23:09:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=13252, Unknown=0, NotChecked=0, Total=14762 [2022-07-11 23:09:19,858 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-11 23:09:23,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:23,957 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-07-11 23:09:23,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-11 23:09:23,958 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) Word has length 219 [2022-07-11 23:09:23,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:23,958 INFO L225 Difference]: With dead ends: 288 [2022-07-11 23:09:23,958 INFO L226 Difference]: Without dead ends: 216 [2022-07-11 23:09:23,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12261 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3939, Invalid=39951, Unknown=0, NotChecked=0, Total=43890 [2022-07-11 23:09:23,961 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 64 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:23,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2339 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2345 Invalid, 0 Unknown, 226 Unchecked, 0.7s Time] [2022-07-11 23:09:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-11 23:09:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-11 23:09:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-11 23:09:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-07-11 23:09:24,017 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 219 [2022-07-11 23:09:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:24,017 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-07-11 23:09:24,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-11 23:09:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-07-11 23:09:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-11 23:09:24,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:24,019 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:24,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:24,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-11 23:09:24,236 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash 762479087, now seen corresponding path program 55 times [2022-07-11 23:09:24,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:24,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757985579] [2022-07-11 23:09:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:24,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:09:24,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1137 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:24,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:24,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757985579] [2022-07-11 23:09:24,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757985579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:24,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641152226] [2022-07-11 23:09:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:09:24,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:24,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:24,793 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-11 23:09:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-11 23:09:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:25,773 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 15 treesize of output 11 [2022-07-11 23:09:25,847 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:25,847 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 25 treesize of output 24 [2022-07-11 23:09:25,943 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:25,943 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 25 treesize of output 24 [2022-07-11 23:09:26,414 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 23 treesize of output 7 [2022-07-11 23:09:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 186 proven. 1134 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-07-11 23:09:26,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:26,647 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 16 treesize of output 14 [2022-07-11 23:09:26,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:09:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1136 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-11 23:09:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641152226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:26,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:26,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 81 [2022-07-11 23:09:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039571235] [2022-07-11 23:09:26,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:26,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-11 23:09:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-11 23:09:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6170, Unknown=0, NotChecked=0, Total=6480 [2022-07-11 23:09:26,849 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-11 23:09:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:28,405 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-07-11 23:09:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-11 23:09:28,405 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) Word has length 223 [2022-07-11 23:09:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:28,406 INFO L225 Difference]: With dead ends: 230 [2022-07-11 23:09:28,406 INFO L226 Difference]: Without dead ends: 228 [2022-07-11 23:09:28,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 436 SyntacticMatches, 13 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3613 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=516, Invalid=10614, Unknown=0, NotChecked=0, Total=11130 [2022-07-11 23:09:28,407 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 140 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 5337 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2584 SdHoareTripleChecker+Invalid, 5544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:28,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2584 Invalid, 5544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5337 Invalid, 0 Unknown, 70 Unchecked, 1.2s Time] [2022-07-11 23:09:28,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-11 23:09:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 220. [2022-07-11 23:09:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-11 23:09:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-07-11 23:09:28,464 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 223 [2022-07-11 23:09:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:28,465 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-07-11 23:09:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.1358024691358026) internal successors, (254), 77 states have internal predecessors, (254), 36 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 38 states have call predecessors, (39), 36 states have call successors, (39) [2022-07-11 23:09:28,465 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-07-11 23:09:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-07-11 23:09:28,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:28,466 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:28,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-11 23:09:28,679 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1414803301, now seen corresponding path program 56 times [2022-07-11 23:09:28,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951249511] [2022-07-11 23:09:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:28,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:29,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:09:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:29,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:29,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:29,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951249511] [2022-07-11 23:09:29,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951249511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558084263] [2022-07-11 23:09:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:09:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:29,505 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:29,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-11 23:09:29,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:09:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:29,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-11 23:09:29,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:30,642 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 15 treesize of output 11 [2022-07-11 23:09:32,826 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:09:32,826 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 27 treesize of output 26 [2022-07-11 23:09:33,469 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 23 treesize of output 7 [2022-07-11 23:09:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 124 proven. 1196 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-11 23:09:33,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:33,745 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 16 treesize of output 14 [2022-07-11 23:09:33,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:09:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 54 proven. 1196 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:34,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558084263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:34,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:34,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 84 [2022-07-11 23:09:34,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236919850] [2022-07-11 23:09:34,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:34,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-11 23:09:34,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:34,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-11 23:09:34,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=6652, Unknown=1, NotChecked=0, Total=6972 [2022-07-11 23:09:34,013 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2022-07-11 23:09:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:35,837 INFO L93 Difference]: Finished difference Result 305 states and 309 transitions. [2022-07-11 23:09:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-11 23:09:35,837 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) Word has length 227 [2022-07-11 23:09:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:35,839 INFO L225 Difference]: With dead ends: 305 [2022-07-11 23:09:35,839 INFO L226 Difference]: Without dead ends: 303 [2022-07-11 23:09:35,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 445 SyntacticMatches, 9 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3659 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=534, Invalid=11455, Unknown=1, NotChecked=0, Total=11990 [2022-07-11 23:09:35,840 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 97 mSDsluCounter, 3295 mSDsCounter, 0 mSdLazyCounter, 5939 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3362 SdHoareTripleChecker+Invalid, 6169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 5939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:35,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3362 Invalid, 6169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 5939 Invalid, 0 Unknown, 149 Unchecked, 1.4s Time] [2022-07-11 23:09:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-11 23:09:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 233. [2022-07-11 23:09:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 192 states have (on average 1.015625) internal successors, (195), 192 states have internal predecessors, (195), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-11 23:09:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-07-11 23:09:35,915 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 227 [2022-07-11 23:09:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:35,915 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-07-11 23:09:35,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.130952380952381) internal successors, (263), 80 states have internal predecessors, (263), 37 states have call successors, (38), 2 states have call predecessors, (38), 3 states have return successors, (39), 39 states have call predecessors, (39), 37 states have call successors, (39) [2022-07-11 23:09:35,916 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-07-11 23:09:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-07-11 23:09:35,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:35,916 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:35,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:36,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:36,134 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:36,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1357499941, now seen corresponding path program 57 times [2022-07-11 23:09:36,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:36,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404423366] [2022-07-11 23:09:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:36,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:36,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:09:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 57 proven. 1259 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:36,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404423366] [2022-07-11 23:09:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404423366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591757122] [2022-07-11 23:09:36,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:09:36,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:36,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:36,718 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:36,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-11 23:09:37,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-07-11 23:09:37,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 23:09:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:38,679 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 15 treesize of output 11 [2022-07-11 23:09:39,710 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:09:39,711 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 25 treesize of output 12 [2022-07-11 23:09:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 618 proven. 698 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:41,157 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 18 [2022-07-11 23:09:41,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:09:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1968 backedges. 601 proven. 715 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:42,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591757122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:42,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:42,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 46] total 128 [2022-07-11 23:09:42,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784311759] [2022-07-11 23:09:42,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-11 23:09:42,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-11 23:09:42,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=14598, Unknown=0, NotChecked=0, Total=16256 [2022-07-11 23:09:42,398 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 3.0625) internal successors, (392), 123 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2022-07-11 23:09:47,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:47,103 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2022-07-11 23:09:47,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-07-11 23:09:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.0625) internal successors, (392), 123 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) Word has length 231 [2022-07-11 23:09:47,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:47,105 INFO L225 Difference]: With dead ends: 304 [2022-07-11 23:09:47,105 INFO L226 Difference]: Without dead ends: 228 [2022-07-11 23:09:47,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16104 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=4754, Invalid=50706, Unknown=0, NotChecked=0, Total=55460 [2022-07-11 23:09:47,109 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 172 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 477 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:47,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1834 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2391 Invalid, 0 Unknown, 477 Unchecked, 0.7s Time] [2022-07-11 23:09:47,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-11 23:09:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-07-11 23:09:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-11 23:09:47,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-07-11 23:09:47,200 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 231 [2022-07-11 23:09:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:47,200 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-07-11 23:09:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.0625) internal successors, (392), 123 states have internal predecessors, (392), 55 states have call successors, (56), 1 states have call predecessors, (56), 2 states have return successors, (57), 57 states have call predecessors, (57), 55 states have call successors, (57) [2022-07-11 23:09:47,202 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-07-11 23:09:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-07-11 23:09:47,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:47,203 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:47,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:47,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:47,408 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:47,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2007340760, now seen corresponding path program 58 times [2022-07-11 23:09:47,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:47,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866252656] [2022-07-11 23:09:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:47,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:48,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:09:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:09:48,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:48,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 54 proven. 1275 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:09:48,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866252656] [2022-07-11 23:09:48,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866252656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:48,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895941637] [2022-07-11 23:09:48,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:09:48,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:48,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:48,033 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:48,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-11 23:09:48,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:09:48,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:48,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-11 23:09:48,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:49,321 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 15 treesize of output 11 [2022-07-11 23:09:49,434 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:49,434 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 25 treesize of output 24 [2022-07-11 23:09:49,579 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:09:49,579 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 25 treesize of output 24 [2022-07-11 23:09:50,224 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 23 treesize of output 7 [2022-07-11 23:09:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 197 proven. 1272 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2022-07-11 23:09:50,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:50,463 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 16 treesize of output 14 [2022-07-11 23:09:50,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:09:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2055 backedges. 54 proven. 1274 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2022-07-11 23:09:50,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895941637] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:50,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:50,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 87 [2022-07-11 23:09:50,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341089818] [2022-07-11 23:09:50,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:50,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-11 23:09:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-11 23:09:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=7147, Unknown=0, NotChecked=0, Total=7482 [2022-07-11 23:09:50,722 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 87 states, 86 states have (on average 3.127906976744186) internal successors, (269), 82 states have internal predecessors, (269), 39 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (42), 41 states have call predecessors, (42), 39 states have call successors, (42) [2022-07-11 23:09:52,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:52,683 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-07-11 23:09:52,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-11 23:09:52,683 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.127906976744186) internal successors, (269), 82 states have internal predecessors, (269), 39 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (42), 41 states have call predecessors, (42), 39 states have call successors, (42) Word has length 235 [2022-07-11 23:09:52,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:52,684 INFO L225 Difference]: With dead ends: 242 [2022-07-11 23:09:52,684 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:09:52,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 460 SyntacticMatches, 13 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=551, Invalid=12105, Unknown=0, NotChecked=0, Total=12656 [2022-07-11 23:09:52,685 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 154 mSDsluCounter, 2436 mSDsCounter, 0 mSdLazyCounter, 5560 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 2507 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 5560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:52,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 2507 Invalid, 5788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 5560 Invalid, 0 Unknown, 77 Unchecked, 1.5s Time] [2022-07-11 23:09:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:09:52,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 232. [2022-07-11 23:09:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 21 states have call successors, (21), 19 states have call predecessors, (21), 19 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-07-11 23:09:52,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2022-07-11 23:09:52,748 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 235 [2022-07-11 23:09:52,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:52,748 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2022-07-11 23:09:52,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.127906976744186) internal successors, (269), 82 states have internal predecessors, (269), 39 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (42), 41 states have call predecessors, (42), 39 states have call successors, (42) [2022-07-11 23:09:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2022-07-11 23:09:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-11 23:09:52,749 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:52,750 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:52,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:52,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:52,971 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1642868194, now seen corresponding path program 59 times [2022-07-11 23:09:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:52,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685409455] [2022-07-11 23:09:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:09:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:09:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:09:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:09:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:09:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:09:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:09:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:09:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:09:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:09:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:09:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:09:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:09:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:09:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:09:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:09:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:09:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:09:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:09:53,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 57 proven. 1338 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:09:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685409455] [2022-07-11 23:09:53,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685409455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:53,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154776175] [2022-07-11 23:09:53,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:09:53,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:53,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:53,669 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:53,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-11 23:09:54,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-11 23:09:54,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:54,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 92 conjunts are in the unsatisfiable core [2022-07-11 23:09:54,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:54,745 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 15 treesize of output 11 [2022-07-11 23:09:59,040 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:09:59,040 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 27 treesize of output 26 [2022-07-11 23:09:59,768 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 23 treesize of output 7 [2022-07-11 23:09:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 131 proven. 1338 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-11 23:09:59,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:59,972 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 16 treesize of output 14 [2022-07-11 23:09:59,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:10:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 57 proven. 1338 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:10:00,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154776175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:00,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:00,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 88 [2022-07-11 23:10:00,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982705160] [2022-07-11 23:10:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-11 23:10:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-11 23:10:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=7319, Unknown=2, NotChecked=0, Total=7656 [2022-07-11 23:10:00,197 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 88 states, 88 states have (on average 3.147727272727273) internal successors, (277), 84 states have internal predecessors, (277), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-11 23:10:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:03,839 INFO L93 Difference]: Finished difference Result 316 states and 320 transitions. [2022-07-11 23:10:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-11 23:10:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.147727272727273) internal successors, (277), 84 states have internal predecessors, (277), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) Word has length 239 [2022-07-11 23:10:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:03,840 INFO L225 Difference]: With dead ends: 316 [2022-07-11 23:10:03,840 INFO L226 Difference]: Without dead ends: 314 [2022-07-11 23:10:03,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 485 SyntacticMatches, 9 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3764 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=524, Invalid=11905, Unknown=3, NotChecked=0, Total=12432 [2022-07-11 23:10:03,841 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 161 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 5237 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 5618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 5237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:03,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 2956 Invalid, 5618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 5237 Invalid, 0 Unknown, 300 Unchecked, 1.2s Time] [2022-07-11 23:10:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-11 23:10:03,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 245. [2022-07-11 23:10:03,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 202 states have (on average 1.0148514851485149) internal successors, (205), 202 states have internal predecessors, (205), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-11 23:10:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 249 transitions. [2022-07-11 23:10:03,910 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 249 transitions. Word has length 239 [2022-07-11 23:10:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:03,910 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 249 transitions. [2022-07-11 23:10:03,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.147727272727273) internal successors, (277), 84 states have internal predecessors, (277), 39 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (41), 41 states have call predecessors, (41), 39 states have call successors, (41) [2022-07-11 23:10:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 249 transitions. [2022-07-11 23:10:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-07-11 23:10:03,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:03,911 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:03,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-11 23:10:04,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:04,122 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:04,123 INFO L85 PathProgramCache]: Analyzing trace with hash -161230828, now seen corresponding path program 60 times [2022-07-11 23:10:04,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:04,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838006325] [2022-07-11 23:10:04,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:04,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:04,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:04,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:04,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 60 proven. 1405 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:10:04,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838006325] [2022-07-11 23:10:04,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838006325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:04,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129285718] [2022-07-11 23:10:04,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:10:04,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:04,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:04,826 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:04,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-11 23:10:05,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-11 23:10:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:10:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-11 23:10:05,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:06,677 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 15 treesize of output 11 [2022-07-11 23:10:07,811 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:10:07,811 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 25 treesize of output 12 [2022-07-11 23:10:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 690 proven. 775 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:10:07,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:09,384 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 18 [2022-07-11 23:10:09,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:10:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 672 proven. 793 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:10:10,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129285718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:10,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:10,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 134 [2022-07-11 23:10:10,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690859433] [2022-07-11 23:10:10,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-11 23:10:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-11 23:10:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1813, Invalid=16009, Unknown=0, NotChecked=0, Total=17822 [2022-07-11 23:10:10,855 INFO L87 Difference]: Start difference. First operand 245 states and 249 transitions. Second operand has 134 states, 134 states have (on average 3.082089552238806) internal successors, (413), 129 states have internal predecessors, (413), 58 states have call successors, (59), 1 states have call predecessors, (59), 2 states have return successors, (60), 60 states have call predecessors, (60), 58 states have call successors, (60) [2022-07-11 23:10:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:15,839 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2022-07-11 23:10:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-11 23:10:15,839 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.082089552238806) internal successors, (413), 129 states have internal predecessors, (413), 58 states have call successors, (59), 1 states have call predecessors, (59), 2 states have return successors, (60), 60 states have call predecessors, (60), 58 states have call successors, (60) Word has length 243 [2022-07-11 23:10:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:15,840 INFO L225 Difference]: With dead ends: 320 [2022-07-11 23:10:15,840 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 23:10:15,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18015 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5241, Invalid=56511, Unknown=0, NotChecked=0, Total=61752 [2022-07-11 23:10:15,844 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 3613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 908 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:15,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 2311 Invalid, 3613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2587 Invalid, 0 Unknown, 908 Unchecked, 0.8s Time] [2022-07-11 23:10:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 23:10:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-11 23:10:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-11 23:10:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-07-11 23:10:15,910 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 243 [2022-07-11 23:10:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:15,910 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-07-11 23:10:15,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.082089552238806) internal successors, (413), 129 states have internal predecessors, (413), 58 states have call successors, (59), 1 states have call predecessors, (59), 2 states have return successors, (60), 60 states have call predecessors, (60), 58 states have call successors, (60) [2022-07-11 23:10:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-07-11 23:10:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-11 23:10:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:15,911 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:15,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-11 23:10:16,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-11 23:10:16,114 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:16,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash -749043871, now seen corresponding path program 61 times [2022-07-11 23:10:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:16,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004430918] [2022-07-11 23:10:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:16,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 23:10:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 57 proven. 1421 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004430918] [2022-07-11 23:10:16,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004430918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:16,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171714117] [2022-07-11 23:10:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:10:16,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:16,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:16,986 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:16,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-11 23:10:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-11 23:10:17,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:18,135 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 15 treesize of output 11 [2022-07-11 23:10:18,272 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:10:18,273 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 25 treesize of output 24 [2022-07-11 23:10:18,418 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 23:10:18,419 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 25 treesize of output 24 [2022-07-11 23:10:19,239 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 23 treesize of output 7 [2022-07-11 23:10:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 208 proven. 1418 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-07-11 23:10:19,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:19,596 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 16 treesize of output 14 [2022-07-11 23:10:19,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:10:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2282 backedges. 57 proven. 1420 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-07-11 23:10:19,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171714117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:19,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:19,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 89 [2022-07-11 23:10:19,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602053860] [2022-07-11 23:10:19,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:19,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-11 23:10:19,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:19,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-11 23:10:19,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=7490, Unknown=0, NotChecked=0, Total=7832 [2022-07-11 23:10:19,937 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 85 states have internal predecessors, (282), 40 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 42 states have call predecessors, (43), 40 states have call successors, (43) [2022-07-11 23:10:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:22,093 INFO L93 Difference]: Finished difference Result 254 states and 257 transitions. [2022-07-11 23:10:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-11 23:10:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 85 states have internal predecessors, (282), 40 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 42 states have call predecessors, (43), 40 states have call successors, (43) Word has length 247 [2022-07-11 23:10:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:22,094 INFO L225 Difference]: With dead ends: 254 [2022-07-11 23:10:22,094 INFO L226 Difference]: Without dead ends: 252 [2022-07-11 23:10:22,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 484 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4312 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=564, Invalid=12776, Unknown=0, NotChecked=0, Total=13340 [2022-07-11 23:10:22,095 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 123 mSDsluCounter, 2587 mSDsCounter, 0 mSdLazyCounter, 6187 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 6393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 6187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:22,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 2661 Invalid, 6393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 6187 Invalid, 0 Unknown, 78 Unchecked, 1.6s Time] [2022-07-11 23:10:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-11 23:10:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 244. [2022-07-11 23:10:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 22 states have call successors, (22), 20 states have call predecessors, (22), 20 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-11 23:10:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-07-11 23:10:22,162 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 247 [2022-07-11 23:10:22,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:22,162 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-07-11 23:10:22,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.168539325842697) internal successors, (282), 85 states have internal predecessors, (282), 40 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 42 states have call predecessors, (43), 40 states have call successors, (43) [2022-07-11 23:10:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-07-11 23:10:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-11 23:10:22,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:22,164 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:22,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-11 23:10:22,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:22,381 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:22,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1573116969, now seen corresponding path program 62 times [2022-07-11 23:10:22,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:22,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998709875] [2022-07-11 23:10:22,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:22,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:22,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:23,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 23:10:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 60 proven. 1488 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998709875] [2022-07-11 23:10:23,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998709875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:23,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922041680] [2022-07-11 23:10:23,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:10:23,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:23,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:23,202 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:23,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-11 23:10:23,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:10:23,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:10:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-11 23:10:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:24,601 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 15 treesize of output 11 [2022-07-11 23:10:24,835 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:10:24,835 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 27 treesize of output 26 [2022-07-11 23:10:25,670 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 23 treesize of output 7 [2022-07-11 23:10:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 138 proven. 1488 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2022-07-11 23:10:25,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:25,983 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 16 treesize of output 14 [2022-07-11 23:10:25,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:10:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 60 proven. 1488 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:26,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922041680] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:26,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:26,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 92 [2022-07-11 23:10:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898049368] [2022-07-11 23:10:26,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:26,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-11 23:10:26,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:26,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-11 23:10:26,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=8021, Unknown=0, NotChecked=0, Total=8372 [2022-07-11 23:10:26,352 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2022-07-11 23:10:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:28,652 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2022-07-11 23:10:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-11 23:10:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) Word has length 251 [2022-07-11 23:10:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:28,653 INFO L225 Difference]: With dead ends: 337 [2022-07-11 23:10:28,654 INFO L226 Difference]: Without dead ends: 335 [2022-07-11 23:10:28,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 493 SyntacticMatches, 9 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=582, Invalid=13698, Unknown=0, NotChecked=0, Total=14280 [2022-07-11 23:10:28,655 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 173 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 6477 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2340 SdHoareTripleChecker+Invalid, 6909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:28,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2340 Invalid, 6909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 6477 Invalid, 0 Unknown, 267 Unchecked, 1.7s Time] [2022-07-11 23:10:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-11 23:10:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 257. [2022-07-11 23:10:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 212 states have (on average 1.0141509433962264) internal successors, (215), 212 states have internal predecessors, (215), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-11 23:10:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 261 transitions. [2022-07-11 23:10:28,727 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 261 transitions. Word has length 251 [2022-07-11 23:10:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:28,728 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 261 transitions. [2022-07-11 23:10:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1630434782608696) internal successors, (291), 88 states have internal predecessors, (291), 41 states have call successors, (42), 2 states have call predecessors, (42), 3 states have return successors, (43), 43 states have call predecessors, (43), 41 states have call successors, (43) [2022-07-11 23:10:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 261 transitions. [2022-07-11 23:10:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-11 23:10:28,729 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:28,729 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 20, 20, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:28,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-11 23:10:28,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-11 23:10:28,947 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:28,947 INFO L85 PathProgramCache]: Analyzing trace with hash 640326989, now seen corresponding path program 63 times [2022-07-11 23:10:28,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:28,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609894388] [2022-07-11 23:10:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:29,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 23:10:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 63 proven. 1559 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609894388] [2022-07-11 23:10:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609894388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:29,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480825781] [2022-07-11 23:10:29,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:10:29,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:29,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:29,695 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:29,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-11 23:10:32,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-11 23:10:32,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:10:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-11 23:10:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:33,759 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 15 treesize of output 11 [2022-07-11 23:10:35,119 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-11 23:10:35,119 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 25 treesize of output 12 [2022-07-11 23:10:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 766 proven. 856 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:35,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:36,794 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 18 [2022-07-11 23:10:36,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-11 23:10:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 747 proven. 875 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:37,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480825781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:37,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:37,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 140 [2022-07-11 23:10:37,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454956128] [2022-07-11 23:10:37,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:37,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-07-11 23:10:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-07-11 23:10:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1975, Invalid=17485, Unknown=0, NotChecked=0, Total=19460 [2022-07-11 23:10:37,947 INFO L87 Difference]: Start difference. First operand 257 states and 261 transitions. Second operand has 140 states, 140 states have (on average 3.1) internal successors, (434), 135 states have internal predecessors, (434), 61 states have call successors, (62), 1 states have call predecessors, (62), 2 states have return successors, (63), 63 states have call predecessors, (63), 61 states have call successors, (63) [2022-07-11 23:10:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:43,452 INFO L93 Difference]: Finished difference Result 336 states and 340 transitions. [2022-07-11 23:10:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-07-11 23:10:43,452 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.1) internal successors, (434), 135 states have internal predecessors, (434), 61 states have call successors, (62), 1 states have call predecessors, (62), 2 states have return successors, (63), 63 states have call predecessors, (63), 61 states have call successors, (63) Word has length 255 [2022-07-11 23:10:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:43,453 INFO L225 Difference]: With dead ends: 336 [2022-07-11 23:10:43,453 INFO L226 Difference]: Without dead ends: 252 [2022-07-11 23:10:43,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 486 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19848 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=5704, Invalid=62156, Unknown=0, NotChecked=0, Total=67860 [2022-07-11 23:10:43,457 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 160 mSDsluCounter, 2520 mSDsCounter, 0 mSdLazyCounter, 2428 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 3531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 968 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:43,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 2592 Invalid, 3531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2428 Invalid, 0 Unknown, 968 Unchecked, 0.7s Time] [2022-07-11 23:10:43,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-11 23:10:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-07-11 23:10:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-11 23:10:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-07-11 23:10:43,534 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 255 [2022-07-11 23:10:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:43,534 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-07-11 23:10:43,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.1) internal successors, (434), 135 states have internal predecessors, (434), 61 states have call successors, (62), 1 states have call predecessors, (62), 2 states have return successors, (63), 63 states have call predecessors, (63), 61 states have call successors, (63) [2022-07-11 23:10:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-07-11 23:10:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-11 23:10:43,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:43,535 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:43,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-11 23:10:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-11 23:10:43,740 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash 372376730, now seen corresponding path program 64 times [2022-07-11 23:10:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:43,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500668082] [2022-07-11 23:10:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:44,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 23:10:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-07-11 23:10:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 60 proven. 1575 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-11 23:10:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:44,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500668082] [2022-07-11 23:10:44,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500668082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:44,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274148269] [2022-07-11 23:10:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:10:44,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:44,455 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:44,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-11 23:10:44,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:10:44,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:10:44,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-11 23:10:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:45,187 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 15 treesize of output 11 [2022-07-11 23:10:45,369 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:10:45,369 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 27 treesize of output 26 [2022-07-11 23:10:47,543 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:10:47,544 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 27 treesize of output 26 [2022-07-11 23:10:48,172 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 23 treesize of output 7 [2022-07-11 23:10:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 219 proven. 1572 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-07-11 23:10:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:48,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274148269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:48,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:10:48,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2022-07-11 23:10:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873875994] [2022-07-11 23:10:48,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-11 23:10:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-11 23:10:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5131, Unknown=0, NotChecked=0, Total=5402 [2022-07-11 23:10:48,353 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) [2022-07-11 23:10:50,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:10:50,689 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2022-07-11 23:10:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-11 23:10:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) Word has length 259 [2022-07-11 23:10:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:10:50,690 INFO L225 Difference]: With dead ends: 261 [2022-07-11 23:10:50,690 INFO L226 Difference]: Without dead ends: 259 [2022-07-11 23:10:50,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 346 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3307 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=500, Invalid=9600, Unknown=0, NotChecked=0, Total=10100 [2022-07-11 23:10:50,691 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 113 mSDsluCounter, 2959 mSDsCounter, 0 mSdLazyCounter, 6147 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:10:50,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 3030 Invalid, 6592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6147 Invalid, 0 Unknown, 326 Unchecked, 1.8s Time] [2022-07-11 23:10:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-07-11 23:10:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 256. [2022-07-11 23:10:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-11 23:10:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2022-07-11 23:10:50,765 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 259 [2022-07-11 23:10:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:10:50,765 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2022-07-11 23:10:50,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.2083333333333335) internal successors, (231), 69 states have internal predecessors, (231), 24 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (26), 26 states have call predecessors, (26), 24 states have call successors, (26) [2022-07-11 23:10:50,765 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2022-07-11 23:10:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-07-11 23:10:50,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:10:50,766 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 21, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:10:50,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-11 23:10:50,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-11 23:10:50,986 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:10:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:10:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash -152279920, now seen corresponding path program 65 times [2022-07-11 23:10:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:10:50,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606760168] [2022-07-11 23:10:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:10:50,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:10:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:10:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:10:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-11 23:10:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-11 23:10:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-11 23:10:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 23:10:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 23:10:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-11 23:10:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-11 23:10:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-11 23:10:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 23:10:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-11 23:10:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-11 23:10:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-11 23:10:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-11 23:10:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-11 23:10:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-11 23:10:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-11 23:10:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-11 23:10:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-11 23:10:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-11 23:10:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:52,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-07-11 23:10:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:52,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-07-11 23:10:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:10:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 63 proven. 1646 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-11 23:10:52,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:10:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606760168] [2022-07-11 23:10:52,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606760168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:10:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375099028] [2022-07-11 23:10:52,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:10:52,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:10:52,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:10:52,009 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:10:52,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-11 23:10:52,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-11 23:10:52,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:10:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-11 23:10:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:10:53,725 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 15 treesize of output 11 [2022-07-11 23:10:53,973 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 23:10:53,973 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 27 treesize of output 26 [2022-07-11 23:10:54,769 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 23 treesize of output 7 [2022-07-11 23:10:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 145 proven. 1646 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-07-11 23:10:54,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:10:54,982 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 16 treesize of output 14 [2022-07-11 23:10:54,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-11 23:10:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 63 proven. 1646 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-11 23:10:55,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375099028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:10:55,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:10:55,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 98 [2022-07-11 23:10:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095654527] [2022-07-11 23:10:55,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:10:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-11 23:10:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:10:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-11 23:10:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=9130, Unknown=0, NotChecked=0, Total=9506 [2022-07-11 23:10:55,338 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 98 states, 97 states have (on average 3.154639175257732) internal successors, (306), 93 states have internal predecessors, (306), 44 states have call successors, (45), 2 states have call predecessors, (45), 3 states have return successors, (46), 46 states have call predecessors, (46), 44 states have call successors, (46)