./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_15x0-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:28:03,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:28:03,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:28:03,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:28:03,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:28:03,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:28:03,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:28:03,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:28:03,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:28:03,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:28:03,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:28:03,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:28:03,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:28:03,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:28:03,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:28:03,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:28:03,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:28:03,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:28:03,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:28:03,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:28:03,437 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:28:03,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:28:03,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:28:03,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:28:03,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:28:03,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:28:03,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:28:03,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:28:03,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:28:03,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:28:03,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:28:03,454 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:28:03,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:28:03,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:28:03,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:28:03,457 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:28:03,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:28:03,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:28:03,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:28:03,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:28:03,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:28:03,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:28:03,461 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:28:03,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:28:03,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:28:03,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:28:03,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:28:03,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:28:03,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:28:03,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:28:03,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:28:03,486 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:28:03,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:28:03,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:28:03,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:28:03,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:28:03,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:28:03,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:28:03,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:28:03,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:28:03,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:28:03,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:28:03,490 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:28:03,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:28:03,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:28:03,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b32326f1b997cecaa031e8ab338eea5ffa634c465fc73ccabccfc7d02b1e5cc1 [2022-07-12 06:28:03,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:28:03,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:28:03,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:28:03,686 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:28:03,686 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:28:03,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2022-07-12 06:28:03,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732b68ba4/0f3614e490c4496babab0e928b7b7038/FLAGbe9757243 [2022-07-12 06:28:04,052 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:28:04,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2022-07-12 06:28:04,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732b68ba4/0f3614e490c4496babab0e928b7b7038/FLAGbe9757243 [2022-07-12 06:28:04,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732b68ba4/0f3614e490c4496babab0e928b7b7038 [2022-07-12 06:28:04,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:28:04,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:28:04,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:28:04,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:28:04,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:28:04,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b0c69d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04, skipping insertion in model container [2022-07-12 06:28:04,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:28:04,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:28:04,609 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/recursive-simple/sum_15x0-1.c[481,494] [2022-07-12 06:28:04,613 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:28:04,621 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:28:04,629 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/recursive-simple/sum_15x0-1.c[481,494] [2022-07-12 06:28:04,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:28:04,638 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:28:04,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04 WrapperNode [2022-07-12 06:28:04,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:28:04,640 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:28:04,640 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:28:04,640 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:28:04,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,658 INFO L137 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-12 06:28:04,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:28:04,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:28:04,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:28:04,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:28:04,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:28:04,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:28:04,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:28:04,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:28:04,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (1/1) ... [2022-07-12 06:28:04,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:28:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:04,699 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) [2022-07-12 06:28:04,705 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 [2022-07-12 06:28:04,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:28:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:28:04,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:28:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-07-12 06:28:04,741 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-07-12 06:28:04,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:28:04,790 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:28:04,791 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:28:04,894 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:28:04,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:28:04,899 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:28:04,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:28:04 BoogieIcfgContainer [2022-07-12 06:28:04,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:28:04,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:28:04,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:28:04,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:28:04,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:28:04" (1/3) ... [2022-07-12 06:28:04,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10680586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:28:04, skipping insertion in model container [2022-07-12 06:28:04,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:28:04" (2/3) ... [2022-07-12 06:28:04,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10680586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:28:04, skipping insertion in model container [2022-07-12 06:28:04,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:28:04" (3/3) ... [2022-07-12 06:28:04,913 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2022-07-12 06:28:04,922 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:28:04,922 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:28:04,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:28:04,970 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@599aff5, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38fbaa10 [2022-07-12 06:28:04,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:28:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:28:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 06:28:04,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:04,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:04,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:04,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-12 06:28:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126328949] [2022-07-12 06:28:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 06:28:05,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:05,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126328949] [2022-07-12 06:28:05,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126328949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:28:05,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:28:05,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:28:05,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612138773] [2022-07-12 06:28:05,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:28:05,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:28:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:28:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:28:05,228 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:28:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:05,289 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-12 06:28:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:28:05,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-12 06:28:05,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:05,296 INFO L225 Difference]: With dead ends: 25 [2022-07-12 06:28:05,297 INFO L226 Difference]: Without dead ends: 15 [2022-07-12 06:28:05,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:28:05,301 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:05,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-12 06:28:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-12 06:28:05,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-12 06:28:05,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-12 06:28:05,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-12 06:28:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:05,330 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-12 06:28:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 06:28:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-12 06:28:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 06:28:05,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:05,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:28:05,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-12 06:28:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657087452] [2022-07-12 06:28:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:05,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:28:05,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657087452] [2022-07-12 06:28:05,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657087452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053241085] [2022-07-12 06:28:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:05,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:05,462 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) [2022-07-12 06:28:05,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:28:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 06:28:05,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 06:28:05,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 06:28:05,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053241085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:05,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:05,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-07-12 06:28:05,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573705627] [2022-07-12 06:28:05,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 06:28:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 06:28:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-12 06:28:05,745 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 06:28:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:05,776 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-12 06:28:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 06:28:05,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-07-12 06:28:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:05,778 INFO L225 Difference]: With dead ends: 22 [2022-07-12 06:28:05,778 INFO L226 Difference]: Without dead ends: 18 [2022-07-12 06:28:05,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-07-12 06:28:05,779 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:05,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 25 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-12 06:28:05,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-12 06:28:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-12 06:28:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-12 06:28:05,783 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-12 06:28:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:05,783 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-12 06:28:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-12 06:28:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-12 06:28:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 06:28:05,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:05,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:05,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:06,001 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-07-12 06:28:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242372964] [2022-07-12 06:28:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:28:06,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242372964] [2022-07-12 06:28:06,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242372964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:06,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741509662] [2022-07-12 06:28:06,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:28:06,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:06,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:06,090 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) [2022-07-12 06:28:06,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:28:06,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:28:06,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:06,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 06:28:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:28:06,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 06:28:06,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741509662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:06,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:06,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-07-12 06:28:06,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647688329] [2022-07-12 06:28:06,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:06,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 06:28:06,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:06,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 06:28:06,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-12 06:28:06,416 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-12 06:28:06,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:06,458 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-12 06:28:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:28:06,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-07-12 06:28:06,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:06,459 INFO L225 Difference]: With dead ends: 25 [2022-07-12 06:28:06,459 INFO L226 Difference]: Without dead ends: 21 [2022-07-12 06:28:06,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-07-12 06:28:06,460 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:06,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-12 06:28:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-12 06:28:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 06:28:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-12 06:28:06,463 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-07-12 06:28:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:06,463 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-12 06:28:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-12 06:28:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-12 06:28:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-12 06:28:06,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:06,464 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:06,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:06,680 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,SelfDestructingSolverStorable2 [2022-07-12 06:28:06,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-07-12 06:28:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:06,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496628382] [2022-07-12 06:28:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:06,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:28:06,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496628382] [2022-07-12 06:28:06,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496628382] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279899887] [2022-07-12 06:28:06,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:28:06,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:06,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:06,822 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) [2022-07-12 06:28:06,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:28:06,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 06:28:06,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:06,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-12 06:28:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:06,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:28:06,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:28:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279899887] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:07,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:07,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2022-07-12 06:28:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620136139] [2022-07-12 06:28:07,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 06:28:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 06:28:07,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-07-12 06:28:07,281 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 06:28:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:07,347 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-12 06:28:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 06:28:07,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-07-12 06:28:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:07,349 INFO L225 Difference]: With dead ends: 28 [2022-07-12 06:28:07,349 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 06:28:07,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-07-12 06:28:07,350 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:07,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 06:28:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-12 06:28:07,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-12 06:28:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-07-12 06:28:07,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-07-12 06:28:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:07,354 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-07-12 06:28:07,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-12 06:28:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-07-12 06:28:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 06:28:07,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:07,354 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:07,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:07,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:07,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:07,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:07,568 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-07-12 06:28:07,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:07,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378059239] [2022-07-12 06:28:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:07,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:28:07,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:07,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378059239] [2022-07-12 06:28:07,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378059239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:07,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895320117] [2022-07-12 06:28:07,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:28:07,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:07,706 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) [2022-07-12 06:28:07,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:28:07,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:28:07,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:07,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 06:28:07,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 06:28:07,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 06:28:08,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895320117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:08,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:08,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2022-07-12 06:28:08,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480541013] [2022-07-12 06:28:08,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-12 06:28:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:08,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-12 06:28:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-12 06:28:08,280 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 06:28:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:08,335 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-12 06:28:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:28:08,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-07-12 06:28:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:08,340 INFO L225 Difference]: With dead ends: 31 [2022-07-12 06:28:08,340 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 06:28:08,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-07-12 06:28:08,341 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:08,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 47 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 06:28:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-12 06:28:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-12 06:28:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-12 06:28:08,346 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-07-12 06:28:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:08,347 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-12 06:28:08,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-12 06:28:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-12 06:28:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-12 06:28:08,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:08,348 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:08,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 06:28:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:08,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-07-12 06:28:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:08,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624486313] [2022-07-12 06:28:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:08,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:08,709 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:28:08,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:08,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624486313] [2022-07-12 06:28:08,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624486313] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:08,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508862423] [2022-07-12 06:28:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:28:08,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:08,711 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) [2022-07-12 06:28:08,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:28:08,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 06:28:08,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 06:28:08,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:28:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:28:09,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508862423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:09,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:09,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2022-07-12 06:28:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860393585] [2022-07-12 06:28:09,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 06:28:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 06:28:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-12 06:28:09,529 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-12 06:28:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:09,599 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-07-12 06:28:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 06:28:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-07-12 06:28:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:09,600 INFO L225 Difference]: With dead ends: 34 [2022-07-12 06:28:09,600 INFO L226 Difference]: Without dead ends: 30 [2022-07-12 06:28:09,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-07-12 06:28:09,601 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:09,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 57 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-12 06:28:09,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-12 06:28:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-12 06:28:09,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-12 06:28:09,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-07-12 06:28:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:09,605 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-12 06:28:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-12 06:28:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-12 06:28:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-12 06:28:09,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:09,607 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:09,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:09,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-07-12 06:28:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:09,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172020082] [2022-07-12 06:28:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-12 06:28:09,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172020082] [2022-07-12 06:28:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172020082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642715117] [2022-07-12 06:28:09,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:28:09,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:09,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:09,951 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) [2022-07-12 06:28:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:28:10,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-12 06:28:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 06:28:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-12 06:28:10,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:28:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642715117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:10,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:10,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2022-07-12 06:28:10,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815565431] [2022-07-12 06:28:10,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:10,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-12 06:28:10,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:10,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-12 06:28:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-12 06:28:10,979 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 06:28:11,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:11,059 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-07-12 06:28:11,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 06:28:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-07-12 06:28:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:11,060 INFO L225 Difference]: With dead ends: 37 [2022-07-12 06:28:11,060 INFO L226 Difference]: Without dead ends: 33 [2022-07-12 06:28:11,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2022-07-12 06:28:11,061 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 97 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:11,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 67 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-12 06:28:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-12 06:28:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 06:28:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-12 06:28:11,065 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-07-12 06:28:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:11,066 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-12 06:28:11,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 06:28:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-12 06:28:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 06:28:11,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:11,067 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:11,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:11,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:11,276 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:11,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-07-12 06:28:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:11,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640545633] [2022-07-12 06:28:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 06:28:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640545633] [2022-07-12 06:28:11,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640545633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91663342] [2022-07-12 06:28:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:28:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:11,444 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) [2022-07-12 06:28:11,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:28:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 06:28:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-12 06:28:11,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 06:28:12,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91663342] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:12,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:12,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2022-07-12 06:28:12,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535183390] [2022-07-12 06:28:12,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:12,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 06:28:12,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 06:28:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-07-12 06:28:12,974 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-12 06:28:13,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:13,076 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-12 06:28:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 06:28:13,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-07-12 06:28:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:13,077 INFO L225 Difference]: With dead ends: 40 [2022-07-12 06:28:13,078 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 06:28:13,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2022-07-12 06:28:13,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 150 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:13,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 61 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 06:28:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-12 06:28:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-12 06:28:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-12 06:28:13,087 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-07-12 06:28:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:13,088 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-12 06:28:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-12 06:28:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-12 06:28:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-12 06:28:13,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:13,091 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:13,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:13,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:13,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:13,298 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-07-12 06:28:13,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:13,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909357871] [2022-07-12 06:28:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:13,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 06:28:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909357871] [2022-07-12 06:28:13,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909357871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:13,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265717503] [2022-07-12 06:28:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:28:13,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:13,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:13,454 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) [2022-07-12 06:28:13,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:28:13,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:28:13,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:13,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 06:28:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-12 06:28:13,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 06:28:15,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265717503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:15,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:15,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2022-07-12 06:28:15,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310107212] [2022-07-12 06:28:15,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:15,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 06:28:15,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 06:28:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-07-12 06:28:15,480 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-12 06:28:15,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:15,577 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-12 06:28:15,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 06:28:15,578 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-07-12 06:28:15,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:15,580 INFO L225 Difference]: With dead ends: 43 [2022-07-12 06:28:15,580 INFO L226 Difference]: Without dead ends: 39 [2022-07-12 06:28:15,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 06:28:15,581 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 63 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:15,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 79 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-12 06:28:15,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-12 06:28:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-12 06:28:15,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-12 06:28:15,584 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-07-12 06:28:15,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:15,585 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-12 06:28:15,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-12 06:28:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-12 06:28:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-12 06:28:15,586 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:15,586 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:15,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:15,794 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,SelfDestructingSolverStorable8 [2022-07-12 06:28:15,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:15,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-07-12 06:28:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:15,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128093375] [2022-07-12 06:28:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-12 06:28:15,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128093375] [2022-07-12 06:28:15,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128093375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:15,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298457814] [2022-07-12 06:28:15,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:28:15,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:15,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:15,977 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) [2022-07-12 06:28:15,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:28:16,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-12 06:28:16,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:16,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 06:28:16,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-12 06:28:16,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 06:28:18,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298457814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:18,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:18,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2022-07-12 06:28:18,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943839693] [2022-07-12 06:28:18,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:18,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-12 06:28:18,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:18,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-12 06:28:18,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2022-07-12 06:28:18,620 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-12 06:28:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:18,741 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-07-12 06:28:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 06:28:18,742 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-07-12 06:28:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:18,743 INFO L225 Difference]: With dead ends: 46 [2022-07-12 06:28:18,743 INFO L226 Difference]: Without dead ends: 42 [2022-07-12 06:28:18,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2022-07-12 06:28:18,744 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 174 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:18,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 89 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-12 06:28:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-12 06:28:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-12 06:28:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-07-12 06:28:18,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-07-12 06:28:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:18,749 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-07-12 06:28:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-12 06:28:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-07-12 06:28:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-12 06:28:18,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:18,752 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:18,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:18,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 06:28:18,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:18,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:18,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-07-12 06:28:18,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:18,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401138735] [2022-07-12 06:28:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:18,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-12 06:28:19,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401138735] [2022-07-12 06:28:19,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401138735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:19,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170933364] [2022-07-12 06:28:19,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:28:19,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:19,192 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) [2022-07-12 06:28:19,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:28:19,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:28:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 06:28:19,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-12 06:28:19,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-12 06:28:22,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170933364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:22,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:22,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2022-07-12 06:28:22,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113227150] [2022-07-12 06:28:22,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-12 06:28:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:22,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-12 06:28:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-07-12 06:28:22,615 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-12 06:28:22,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:22,747 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-12 06:28:22,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 06:28:22,747 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-07-12 06:28:22,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:22,748 INFO L225 Difference]: With dead ends: 49 [2022-07-12 06:28:22,748 INFO L226 Difference]: Without dead ends: 45 [2022-07-12 06:28:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2022-07-12 06:28:22,749 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:22,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 91 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-12 06:28:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-12 06:28:22,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-12 06:28:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-12 06:28:22,754 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-07-12 06:28:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:22,755 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-12 06:28:22,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-12 06:28:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-12 06:28:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 06:28:22,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:22,756 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:22,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:22,959 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,SelfDestructingSolverStorable10 [2022-07-12 06:28:22,959 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-07-12 06:28:22,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852322632] [2022-07-12 06:28:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:22,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-12 06:28:23,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852322632] [2022-07-12 06:28:23,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852322632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:23,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171597931] [2022-07-12 06:28:23,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:28:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:23,221 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) [2022-07-12 06:28:23,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:28:23,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 06:28:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-12 06:28:23,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-12 06:28:23,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-12 06:28:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171597931] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:27,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2022-07-12 06:28:27,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582867570] [2022-07-12 06:28:27,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:27,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 06:28:27,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:27,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 06:28:27,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-07-12 06:28:27,605 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-12 06:28:27,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:27,710 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-07-12 06:28:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-12 06:28:27,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2022-07-12 06:28:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:27,711 INFO L225 Difference]: With dead ends: 52 [2022-07-12 06:28:27,711 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 06:28:27,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2022-07-12 06:28:27,712 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:27,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 89 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:28:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 06:28:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 06:28:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-12 06:28:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-07-12 06:28:27,715 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-07-12 06:28:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:27,715 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-07-12 06:28:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-12 06:28:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-07-12 06:28:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-12 06:28:27,716 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:27,716 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:27,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 06:28:27,923 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,SelfDestructingSolverStorable11 [2022-07-12 06:28:27,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:27,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-07-12 06:28:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897312354] [2022-07-12 06:28:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:27,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:27,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:27,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-12 06:28:28,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897312354] [2022-07-12 06:28:28,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897312354] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:28,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407010139] [2022-07-12 06:28:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:28:28,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:28,176 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) [2022-07-12 06:28:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 06:28:28,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-12 06:28:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-12 06:28:28,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-12 06:28:28,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:33,549 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-12 06:28:33,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407010139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:33,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:33,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2022-07-12 06:28:33,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707899047] [2022-07-12 06:28:33,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:33,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-12 06:28:33,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:33,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-12 06:28:33,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-07-12 06:28:33,551 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-12 06:28:33,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:33,716 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-12 06:28:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 06:28:33,717 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2022-07-12 06:28:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:33,718 INFO L225 Difference]: With dead ends: 55 [2022-07-12 06:28:33,718 INFO L226 Difference]: Without dead ends: 51 [2022-07-12 06:28:33,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2022-07-12 06:28:33,719 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 198 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:33,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 91 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-12 06:28:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-12 06:28:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-12 06:28:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-12 06:28:33,723 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-07-12 06:28:33,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:33,724 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-12 06:28:33,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-12 06:28:33,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-12 06:28:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-12 06:28:33,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:33,725 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:33,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-12 06:28:33,927 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,SelfDestructingSolverStorable12 [2022-07-12 06:28:33,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-07-12 06:28:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:33,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669943296] [2022-07-12 06:28:33,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:33,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:33,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-12 06:28:34,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669943296] [2022-07-12 06:28:34,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669943296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:34,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483888250] [2022-07-12 06:28:34,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:28:34,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:34,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:34,204 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) [2022-07-12 06:28:34,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 06:28:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 06:28:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-12 06:28:34,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-12 06:28:40,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483888250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:40,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:40,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2022-07-12 06:28:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996748277] [2022-07-12 06:28:40,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:40,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-12 06:28:40,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-12 06:28:40,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 06:28:40,848 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-12 06:28:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:41,054 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-07-12 06:28:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:28:41,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2022-07-12 06:28:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:41,055 INFO L225 Difference]: With dead ends: 58 [2022-07-12 06:28:41,056 INFO L226 Difference]: Without dead ends: 54 [2022-07-12 06:28:41,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2022-07-12 06:28:41,057 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 384 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-12 06:28:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-12 06:28:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-12 06:28:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-12 06:28:41,067 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-07-12 06:28:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:41,067 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-12 06:28:41,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-12 06:28:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-12 06:28:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-12 06:28:41,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:41,068 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:41,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-12 06:28:41,275 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,SelfDestructingSolverStorable13 [2022-07-12 06:28:41,275 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-07-12 06:28:41,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:41,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514973398] [2022-07-12 06:28:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:41,565 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-12 06:28:41,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514973398] [2022-07-12 06:28:41,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514973398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:41,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337173860] [2022-07-12 06:28:41,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:28:41,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:41,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:41,568 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) [2022-07-12 06:28:41,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 06:28:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:28:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:42,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-12 06:28:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-12 06:28:42,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-12 06:28:49,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337173860] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:49,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:49,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 35 [2022-07-12 06:28:49,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054645184] [2022-07-12 06:28:49,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:49,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 06:28:49,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:49,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 06:28:49,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:28:49,714 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2022-07-12 06:28:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:49,880 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-07-12 06:28:49,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-12 06:28:49,880 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) Word has length 94 [2022-07-12 06:28:49,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:49,881 INFO L225 Difference]: With dead ends: 61 [2022-07-12 06:28:49,881 INFO L226 Difference]: Without dead ends: 57 [2022-07-12 06:28:49,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=833, Invalid=1617, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 06:28:49,882 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 195 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:49,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 111 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:28:49,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-12 06:28:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-12 06:28:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-12 06:28:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-12 06:28:49,885 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-07-12 06:28:49,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:49,885 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-12 06:28:49,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 35 states have internal predecessors, (70), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (43), 15 states have call predecessors, (43), 17 states have call successors, (43) [2022-07-12 06:28:49,888 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-12 06:28:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-12 06:28:49,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:28:49,889 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:28:49,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-12 06:28:50,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:50,090 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:28:50,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:28:50,090 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-07-12 06:28:50,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:28:50,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199385544] [2022-07-12 06:28:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:28:50,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:28:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:50,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:51,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:28:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:28:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-07-12 06:28:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:28:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199385544] [2022-07-12 06:28:51,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199385544] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:28:51,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794687521] [2022-07-12 06:28:51,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:28:51,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:28:51,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:28:51,037 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) [2022-07-12 06:28:51,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 06:28:51,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-12 06:28:51,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:28:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 137 conjunts are in the unsatisfiable core [2022-07-12 06:28:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:28:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-12 06:28:52,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:28:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 374 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-07-12 06:28:57,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794687521] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:28:57,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:28:57,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 79 [2022-07-12 06:28:57,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52993631] [2022-07-12 06:28:57,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:28:57,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-07-12 06:28:57,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:28:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-07-12 06:28:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5775, Unknown=0, NotChecked=0, Total=6162 [2022-07-12 06:28:57,681 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) [2022-07-12 06:28:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:28:59,747 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-12 06:28:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 06:28:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) Word has length 100 [2022-07-12 06:28:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:28:59,748 INFO L225 Difference]: With dead ends: 60 [2022-07-12 06:28:59,748 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 06:28:59,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 173 SyntacticMatches, 17 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1005, Invalid=12105, Unknown=0, NotChecked=0, Total=13110 [2022-07-12 06:28:59,751 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1657 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:28:59,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 793 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1657 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:28:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 06:28:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 06:28:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 06:28:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 06:28:59,752 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2022-07-12 06:28:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:28:59,752 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 06:28:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 74 states have (on average 1.135135135135135) internal successors, (84), 46 states have internal predecessors, (84), 7 states have call successors, (7), 1 states have call predecessors, (7), 32 states have return successors, (34), 33 states have call predecessors, (34), 7 states have call successors, (34) [2022-07-12 06:28:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 06:28:59,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 06:28:59,754 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 06:28:59,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-12 06:28:59,971 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,SelfDestructingSolverStorable15 [2022-07-12 06:28:59,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-12 06:28:59,983 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2022-07-12 06:28:59,984 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L895 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| 15)) [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L895 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L899 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2022-07-12 06:28:59,985 INFO L902 garLoopResultBuilder]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2022-07-12 06:28:59,988 INFO L356 BasicCegarLoop]: Path program histogram: [15, 1] [2022-07-12 06:28:59,990 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 06:28:59,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 06:28:59 BoogieIcfgContainer [2022-07-12 06:28:59,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 06:28:59,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 06:28:59,993 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 06:28:59,993 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 06:28:59,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:28:04" (3/4) ... [2022-07-12 06:28:59,995 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-12 06:28:59,999 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2022-07-12 06:29:00,002 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-12 06:29:00,002 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-12 06:29:00,002 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-12 06:29:00,002 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-12 06:29:00,023 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 06:29:00,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 06:29:00,023 INFO L158 Benchmark]: Toolchain (without parser) took 55546.93ms. Allocated memory was 92.3MB in the beginning and 255.9MB in the end (delta: 163.6MB). Free memory was 56.8MB in the beginning and 79.2MB in the end (delta: -22.3MB). Peak memory consumption was 140.9MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,023 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 72.6MB in the beginning and 72.5MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:29:00,024 INFO L158 Benchmark]: CACSL2BoogieTranslator took 161.56ms. Allocated memory is still 92.3MB. Free memory was 56.7MB in the beginning and 69.7MB in the end (delta: -13.0MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,024 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.01ms. Allocated memory is still 92.3MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 06:29:00,024 INFO L158 Benchmark]: Boogie Preprocessor took 13.74ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 67.5MB in the end (delta: 829.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,024 INFO L158 Benchmark]: RCFGBuilder took 229.64ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 58.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,024 INFO L158 Benchmark]: TraceAbstraction took 55087.49ms. Allocated memory was 92.3MB in the beginning and 255.9MB in the end (delta: 163.6MB). Free memory was 57.9MB in the beginning and 82.3MB in the end (delta: -24.4MB). Peak memory consumption was 143.3MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,025 INFO L158 Benchmark]: Witness Printer took 30.28ms. Allocated memory is still 255.9MB. Free memory was 81.3MB in the beginning and 79.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 06:29:00,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 92.3MB. Free memory was 72.6MB in the beginning and 72.5MB in the end (delta: 92.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 161.56ms. Allocated memory is still 92.3MB. Free memory was 56.7MB in the beginning and 69.7MB in the end (delta: -13.0MB). Peak memory consumption was 8.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.01ms. Allocated memory is still 92.3MB. Free memory was 69.7MB in the beginning and 68.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 13.74ms. Allocated memory is still 92.3MB. Free memory was 68.4MB in the beginning and 67.5MB in the end (delta: 829.4kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 229.64ms. Allocated memory is still 92.3MB. Free memory was 67.3MB in the beginning and 58.4MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 55087.49ms. Allocated memory was 92.3MB in the beginning and 255.9MB in the end (delta: 163.6MB). Free memory was 57.9MB in the beginning and 82.3MB in the end (delta: -24.4MB). Peak memory consumption was 143.3MB. Max. memory is 16.1GB. * Witness Printer took 30.28ms. Allocated memory is still 255.9MB. Free memory was 81.3MB in the beginning and 79.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 55.0s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1846 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1679 mSDsluCounter, 1810 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1652 mSDsCounter, 817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2595 IncrementalHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 817 mSolverCounterUnsat, 158 mSDtfsCounter, 2595 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2340 GetRequests, 1792 SyntacticMatches, 19 SemanticMatches, 529 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6547 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, InterpolantAutomatonStates: 220, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 44.7s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 2574 ConstructedInterpolants, 0 QuantifiedInterpolants, 8818 SizeOfPredicates, 142 NumberOfNonLiveVariables, 2925 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 46 InterpolantComputations, 1 PerfectInterpolantSequences, 5031/11520 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-12 06:29:00,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE