./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array22_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array22_pattern.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 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:39:54,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:39:54,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:39:54,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:39:54,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:39:54,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:39:54,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:39:54,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:39:54,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:39:54,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:39:54,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:39:54,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:39:54,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:39:54,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:39:54,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:39:54,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:39:54,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:39:54,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:39:54,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:39:54,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:39:54,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:39:54,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:39:54,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:39:54,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:39:54,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:39:54,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:39:54,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:39:54,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:39:54,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:39:54,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:39:54,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:39:54,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:39:54,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:39:54,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:39:54,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:39:54,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:39:54,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:39:54,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:39:54,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:39:54,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:39:54,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:39:54,716 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:39:54,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:39:54,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:39:54,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:39:54,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:39:54,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:39:54,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:39:54,754 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:39:54,754 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:39:54,754 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:39:54,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:39:54,755 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:39:54,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:39:54,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:39:54,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:39:54,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:39:54,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:39:54,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:39:54,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:39:54,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:39:54,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:39:54,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:39:54,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:39:54,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:39:54,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:39:54,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:39:54,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:39:54,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:39:54,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:39:54,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:39:54,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:39:54,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:39:54,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:39:54,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:39:54,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:39:54,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2021-12-17 00:39:54,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:39:54,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:39:54,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:39:54,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:39:54,974 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:39:54,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array22_pattern.c [2021-12-17 00:39:55,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a54df8f/8217075afa2b4129aa76fa82d48a4b23/FLAGfe70e6d7a [2021-12-17 00:39:55,374 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:39:55,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c [2021-12-17 00:39:55,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a54df8f/8217075afa2b4129aa76fa82d48a4b23/FLAGfe70e6d7a [2021-12-17 00:39:55,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94a54df8f/8217075afa2b4129aa76fa82d48a4b23 [2021-12-17 00:39:55,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:39:55,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:39:55,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:39:55,400 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:39:55,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:39:55,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f6bca86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55, skipping insertion in model container [2021-12-17 00:39:55,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:39:55,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:39:55,562 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-12-17 00:39:55,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:39:55,585 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:39:55,595 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-12-17 00:39:55,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:39:55,614 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:39:55,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55 WrapperNode [2021-12-17 00:39:55,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:39:55,622 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:39:55,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:39:55,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:39:55,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,665 INFO L137 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2021-12-17 00:39:55,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:39:55,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:39:55,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:39:55,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:39:55,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:39:55,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:39:55,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:39:55,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:39:55,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (1/1) ... [2021-12-17 00:39:55,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:39:55,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:55,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:39:55,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:39:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-12-17 00:39:55,780 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-12-17 00:39:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:39:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:39:55,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:39:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:39:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:39:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:39:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:39:55,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:39:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:39:55,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:39:55,843 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:39:55,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:39:55,977 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:39:55,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:39:55,982 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:39:55,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:39:55 BoogieIcfgContainer [2021-12-17 00:39:55,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:39:55,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:39:55,985 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:39:55,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:39:55,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:39:55" (1/3) ... [2021-12-17 00:39:55,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e1dd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:39:55, skipping insertion in model container [2021-12-17 00:39:55,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:39:55" (2/3) ... [2021-12-17 00:39:55,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18e1dd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:39:55, skipping insertion in model container [2021-12-17 00:39:55,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:39:55" (3/3) ... [2021-12-17 00:39:55,990 INFO L111 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2021-12-17 00:39:55,994 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:39:55,994 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:39:56,028 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:39:56,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:39:56,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:39:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:39:56,099 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:56,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:56,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:56,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1798908762, now seen corresponding path program 1 times [2021-12-17 00:39:56,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656886113] [2021-12-17 00:39:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:56,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:56,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 00:39:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:39:56,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:56,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656886113] [2021-12-17 00:39:56,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656886113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:39:56,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:39:56,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:39:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555789256] [2021-12-17 00:39:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:39:56,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:39:56,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:56,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:39:56,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:39:56,343 INFO L87 Difference]: Start difference. First operand has 41 states, 32 states have (on average 1.53125) internal successors, (49), 33 states have internal predecessors, (49), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-17 00:39:56,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:56,367 INFO L93 Difference]: Finished difference Result 79 states and 117 transitions. [2021-12-17 00:39:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:39:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15 [2021-12-17 00:39:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:56,376 INFO L225 Difference]: With dead ends: 79 [2021-12-17 00:39:56,376 INFO L226 Difference]: Without dead ends: 37 [2021-12-17 00:39:56,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:39:56,388 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:56,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:39:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-17 00:39:56,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-17 00:39:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-12-17 00:39:56,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 15 [2021-12-17 00:39:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:56,427 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-12-17 00:39:56,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-17 00:39:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-12-17 00:39:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:39:56,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:56,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:39:56,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:56,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1909329698, now seen corresponding path program 1 times [2021-12-17 00:39:56,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:56,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005982105] [2021-12-17 00:39:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:56,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:56,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420589592] [2021-12-17 00:39:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:56,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:56,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:56,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:56,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:39:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:56,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:39:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:39:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:39:56,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:39:56,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005982105] [2021-12-17 00:39:56,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:39:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420589592] [2021-12-17 00:39:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420589592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:39:56,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:39:56,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:39:56,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324149130] [2021-12-17 00:39:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:39:56,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:39:56,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:39:56,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:39:56,698 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:56,718 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-12-17 00:39:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:39:56,719 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-12-17 00:39:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:56,720 INFO L225 Difference]: With dead ends: 44 [2021-12-17 00:39:56,720 INFO L226 Difference]: Without dead ends: 40 [2021-12-17 00:39:56,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:39:56,722 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:56,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:39:56,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-17 00:39:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-17 00:39:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-17 00:39:56,729 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 42 [2021-12-17 00:39:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:56,730 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-17 00:39:56,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-17 00:39:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 00:39:56,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:56,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:56,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 00:39:56,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:56,948 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:56,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1786751912, now seen corresponding path program 1 times [2021-12-17 00:39:56,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:56,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613565699] [2021-12-17 00:39:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:56,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:56,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234071911] [2021-12-17 00:39:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:56,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:56,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:56,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:56,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:39:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:39:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:39:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:39:57,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:39:57,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:57,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613565699] [2021-12-17 00:39:57,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:39:57,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234071911] [2021-12-17 00:39:57,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234071911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:39:57,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:39:57,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:39:57,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163593338] [2021-12-17 00:39:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:39:57,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:39:57,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:39:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:39:57,185 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:57,287 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2021-12-17 00:39:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:39:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2021-12-17 00:39:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:57,289 INFO L225 Difference]: With dead ends: 83 [2021-12-17 00:39:57,289 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 00:39:57,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:39:57,290 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:57,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:39:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 00:39:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-12-17 00:39:57,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-17 00:39:57,297 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 47 [2021-12-17 00:39:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:57,297 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-17 00:39:57,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-17 00:39:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 00:39:57,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:57,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:57,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:39:57,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 00:39:57,522 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:57,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2075657686, now seen corresponding path program 1 times [2021-12-17 00:39:57,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:57,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446354772] [2021-12-17 00:39:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:57,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:57,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:57,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420252286] [2021-12-17 00:39:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:57,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:57,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:57,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:57,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:39:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:57,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:39:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:39:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:39:57,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:39:57,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:57,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446354772] [2021-12-17 00:39:57,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:39:57,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420252286] [2021-12-17 00:39:57,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420252286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:39:57,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:39:57,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:39:57,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768844878] [2021-12-17 00:39:57,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:39:57,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:39:57,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:57,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:39:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:39:57,693 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:57,735 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2021-12-17 00:39:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:39:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-12-17 00:39:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:57,737 INFO L225 Difference]: With dead ends: 80 [2021-12-17 00:39:57,737 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 00:39:57,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:39:57,738 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:57,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:39:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 00:39:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-12-17 00:39:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:57,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-17 00:39:57,744 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 50 [2021-12-17 00:39:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:57,745 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-17 00:39:57,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:39:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-17 00:39:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:39:57,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:57,746 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:57,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:39:57,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:57,956 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:57,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash 874891816, now seen corresponding path program 1 times [2021-12-17 00:39:57,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:57,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376019600] [2021-12-17 00:39:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:57,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:57,967 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:57,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572135187] [2021-12-17 00:39:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:57,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:57,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:57,969 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:57,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:39:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:39:58,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:39:58,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:39:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:39:58,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:39:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:39:58,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:58,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376019600] [2021-12-17 00:39:58,359 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:39:58,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572135187] [2021-12-17 00:39:58,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572135187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:39:58,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:39:58,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-12-17 00:39:58,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819737775] [2021-12-17 00:39:58,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:39:58,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:39:58,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:39:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:39:58,362 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:39:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:58,476 INFO L93 Difference]: Finished difference Result 87 states and 107 transitions. [2021-12-17 00:39:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 00:39:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-12-17 00:39:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:58,477 INFO L225 Difference]: With dead ends: 87 [2021-12-17 00:39:58,477 INFO L226 Difference]: Without dead ends: 51 [2021-12-17 00:39:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:39:58,478 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:58,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 92 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:39:58,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-17 00:39:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-12-17 00:39:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-12-17 00:39:58,484 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 52 [2021-12-17 00:39:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:58,485 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-12-17 00:39:58,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:39:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-12-17 00:39:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 00:39:58,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:58,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:58,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:39:58,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:58,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1211966936, now seen corresponding path program 2 times [2021-12-17 00:39:58,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:58,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148862413] [2021-12-17 00:39:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:58,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:58,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:58,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787079537] [2021-12-17 00:39:58,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:39:58,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:58,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:58,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:39:58,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:39:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:39:58,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:39:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:39:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:39:58,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:39:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 00:39:59,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:39:59,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148862413] [2021-12-17 00:39:59,027 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:39:59,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787079537] [2021-12-17 00:39:59,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787079537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:39:59,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:39:59,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 00:39:59,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127302807] [2021-12-17 00:39:59,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:39:59,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:39:59,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:39:59,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:39:59,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:39:59,030 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:39:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:39:59,183 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2021-12-17 00:39:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:39:59,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-12-17 00:39:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:39:59,185 INFO L225 Difference]: With dead ends: 108 [2021-12-17 00:39:59,185 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 00:39:59,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:39:59,186 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:39:59,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 151 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:39:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 00:39:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2021-12-17 00:39:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:39:59,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-12-17 00:39:59,193 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 56 [2021-12-17 00:39:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:39:59,194 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-12-17 00:39:59,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:39:59,194 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-12-17 00:39:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:39:59,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:39:59,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:39:59,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:39:59,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:59,416 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:39:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:39:59,416 INFO L85 PathProgramCache]: Analyzing trace with hash -511912674, now seen corresponding path program 3 times [2021-12-17 00:39:59,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:39:59,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546853594] [2021-12-17 00:39:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:39:59,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:39:59,427 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:39:59,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054579470] [2021-12-17 00:39:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:39:59,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:39:59,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:39:59,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:39:59,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:40:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:40:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:40:00,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 99 conjunts are in the unsatisfiable core [2021-12-17 00:40:00,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:40:00,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:40:00,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-17 00:40:00,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 00:40:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2021-12-17 00:40:00,593 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-12-17 00:40:00,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 87 [2021-12-17 00:40:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:00,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 7 [2021-12-17 00:40:00,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:40:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2021-12-17 00:40:00,818 INFO L354 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2021-12-17 00:40:00,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 88 [2021-12-17 00:40:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:00,842 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-12-17 00:40:00,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 14 [2021-12-17 00:40:00,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:00,900 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-17 00:40:00,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 19 [2021-12-17 00:40:01,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 128 [2021-12-17 00:40:01,215 INFO L354 Elim1Store]: treesize reduction 604, result has 13.8 percent of original size [2021-12-17 00:40:01,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 185 [2021-12-17 00:40:01,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,252 INFO L354 Elim1Store]: treesize reduction 82, result has 1.2 percent of original size [2021-12-17 00:40:01,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 174 treesize of output 111 [2021-12-17 00:40:01,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:01,361 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-12-17 00:40:01,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 66 [2021-12-17 00:40:08,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 100 [2021-12-17 00:40:08,583 INFO L354 Elim1Store]: treesize reduction 424, result has 33.8 percent of original size [2021-12-17 00:40:08,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 99 treesize of output 289 [2021-12-17 00:40:08,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:40:08,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:40:08,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:40:09,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:40:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:09,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:09,534 INFO L244 Elim1Store]: Index analysis took 107 ms [2021-12-17 00:40:09,623 INFO L354 Elim1Store]: treesize reduction 54, result has 52.2 percent of original size [2021-12-17 00:40:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 136 [2021-12-17 00:40:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 426 treesize of output 385 [2021-12-17 00:40:51,617 INFO L354 Elim1Store]: treesize reduction 1485, result has 21.1 percent of original size [2021-12-17 00:40:51,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 388 treesize of output 652 [2021-12-17 00:40:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 40 [2021-12-17 00:40:52,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:40:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:40:52,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 55 [2021-12-17 00:40:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:52,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:40:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 98 [2021-12-17 00:40:53,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:53,610 INFO L354 Elim1Store]: treesize reduction 37, result has 2.6 percent of original size [2021-12-17 00:40:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 376 treesize of output 280 [2021-12-17 00:40:55,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:40:55,550 INFO L354 Elim1Store]: treesize reduction 22, result has 42.1 percent of original size [2021-12-17 00:40:55,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 427 treesize of output 304 [2021-12-17 00:42:19,762 INFO L354 Elim1Store]: treesize reduction 1256, result has 14.6 percent of original size [2021-12-17 00:42:19,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 257 treesize of output 268 [2021-12-17 00:42:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 47 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:42:21,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:49,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546853594] [2021-12-17 00:42:49,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054579470] [2021-12-17 00:42:49,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054579470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 00:42:49,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 00:42:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-12-17 00:42:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261302571] [2021-12-17 00:42:49,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:49,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-17 00:42:49,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-17 00:42:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=3887, Unknown=44, NotChecked=0, Total=4422 [2021-12-17 00:42:49,508 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 42 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:42:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:50,626 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2021-12-17 00:42:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-17 00:42:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 42 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2021-12-17 00:42:50,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:50,630 INFO L225 Difference]: With dead ends: 121 [2021-12-17 00:42:50,630 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 00:42:50,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2226 ImplicationChecksByTransitivity, 119.5s TimeCoverageRelationStatistics Valid=530, Invalid=4256, Unknown=44, NotChecked=0, Total=4830 [2021-12-17 00:42:50,632 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:50,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 549 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 437 Unchecked, 0.2s Time] [2021-12-17 00:42:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 00:42:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2021-12-17 00:42:50,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 95 states have (on average 1.2) internal successors, (114), 95 states have internal predecessors, (114), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-12-17 00:42:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-12-17 00:42:50,646 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 70 [2021-12-17 00:42:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:50,646 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-12-17 00:42:50,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 42 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:42:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-12-17 00:42:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:50,652 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:50,652 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:50,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 00:42:50,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:50,853 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash -293057956, now seen corresponding path program 1 times [2021-12-17 00:42:50,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550113326] [2021-12-17 00:42:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:50,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:50,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294549835] [2021-12-17 00:42:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:50,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:50,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:50,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:50,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 00:42:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:50,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:42:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 00:42:51,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:42:51,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550113326] [2021-12-17 00:42:51,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:51,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294549835] [2021-12-17 00:42:51,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294549835] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:42:51,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:42:51,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:42:51,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296500641] [2021-12-17 00:42:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:42:51,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:42:51,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:51,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:42:51,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:51,063 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:51,103 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-12-17 00:42:51,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:42:51,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 70 [2021-12-17 00:42:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:51,104 INFO L225 Difference]: With dead ends: 157 [2021-12-17 00:42:51,104 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 00:42:51,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:51,105 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:51,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:42:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 00:42:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-12-17 00:42:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 98 states have (on average 1.183673469387755) internal successors, (116), 98 states have internal predecessors, (116), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-17 00:42:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 138 transitions. [2021-12-17 00:42:51,117 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 138 transitions. Word has length 70 [2021-12-17 00:42:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:51,118 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 138 transitions. [2021-12-17 00:42:51,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:51,118 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 138 transitions. [2021-12-17 00:42:51,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:51,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:51,120 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:51,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:51,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:51,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -480892867, now seen corresponding path program 1 times [2021-12-17 00:42:51,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706647336] [2021-12-17 00:42:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:51,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:51,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:51,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817394235] [2021-12-17 00:42:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:51,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:51,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:51,355 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:51,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 00:42:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:51,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:42:51,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 00:42:51,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:42:51,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706647336] [2021-12-17 00:42:51,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817394235] [2021-12-17 00:42:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817394235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:42:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:42:51,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:42:51,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134000705] [2021-12-17 00:42:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:42:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:42:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:51,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:42:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:51,526 INFO L87 Difference]: Start difference. First operand 116 states and 138 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:51,549 INFO L93 Difference]: Finished difference Result 161 states and 192 transitions. [2021-12-17 00:42:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:42:51,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 70 [2021-12-17 00:42:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:51,550 INFO L225 Difference]: With dead ends: 161 [2021-12-17 00:42:51,550 INFO L226 Difference]: Without dead ends: 117 [2021-12-17 00:42:51,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:51,551 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:51,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 141 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:42:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-17 00:42:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-12-17 00:42:51,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 98 states have internal predecessors, (115), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-17 00:42:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-12-17 00:42:51,562 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 70 [2021-12-17 00:42:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-12-17 00:42:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-12-17 00:42:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:51,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:51,564 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:51,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 00:42:51,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash -262038149, now seen corresponding path program 1 times [2021-12-17 00:42:51,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:51,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692360397] [2021-12-17 00:42:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:51,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:51,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:51,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016970847] [2021-12-17 00:42:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:51,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:51,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:51,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:51,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 00:42:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:42:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 00:42:52,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 00:42:52,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692360397] [2021-12-17 00:42:52,259 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016970847] [2021-12-17 00:42:52,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016970847] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:52,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:52,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-12-17 00:42:52,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699918983] [2021-12-17 00:42:52,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:52,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:42:52,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:42:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:42:52,260 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:52,483 INFO L93 Difference]: Finished difference Result 189 states and 225 transitions. [2021-12-17 00:42:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:42:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-12-17 00:42:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:52,485 INFO L225 Difference]: With dead ends: 189 [2021-12-17 00:42:52,485 INFO L226 Difference]: Without dead ends: 145 [2021-12-17 00:42:52,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:42:52,486 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:52,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 174 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:42:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-17 00:42:52,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2021-12-17 00:42:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 102 states have internal predecessors, (120), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 00:42:52,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2021-12-17 00:42:52,496 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 70 [2021-12-17 00:42:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:52,497 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2021-12-17 00:42:52,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2021-12-17 00:42:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:52,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:52,498 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:52,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:52,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 00:42:52,720 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:52,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:52,720 INFO L85 PathProgramCache]: Analyzing trace with hash -489280420, now seen corresponding path program 1 times [2021-12-17 00:42:52,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:52,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948230542] [2021-12-17 00:42:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:52,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:52,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659383452] [2021-12-17 00:42:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:52,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:52,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:52,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 00:42:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:42:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-17 00:42:52,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:42:52,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:52,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948230542] [2021-12-17 00:42:52,882 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:52,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659383452] [2021-12-17 00:42:52,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659383452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:42:52,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:42:52,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:42:52,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757742950] [2021-12-17 00:42:52,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:42:52,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:42:52,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:42:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:52,884 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:52,906 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2021-12-17 00:42:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:42:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-12-17 00:42:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:52,908 INFO L225 Difference]: With dead ends: 172 [2021-12-17 00:42:52,908 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 00:42:52,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:52,909 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:52,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:42:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 00:42:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-17 00:42:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 1.145631067961165) internal successors, (118), 102 states have internal predecessors, (118), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 00:42:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-12-17 00:42:52,919 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 70 [2021-12-17 00:42:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:52,920 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-12-17 00:42:52,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-12-17 00:42:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:52,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:52,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:52,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:53,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 00:42:53,135 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:53,136 INFO L85 PathProgramCache]: Analyzing trace with hash 513579325, now seen corresponding path program 2 times [2021-12-17 00:42:53,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:53,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144375984] [2021-12-17 00:42:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:53,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:53,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:53,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877052234] [2021-12-17 00:42:53,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:42:53,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:53,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:53,150 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:53,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 00:42:53,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:42:53,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:42:53,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:42:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-17 00:42:53,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:42:53,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144375984] [2021-12-17 00:42:53,307 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:53,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877052234] [2021-12-17 00:42:53,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877052234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:42:53,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:42:53,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:42:53,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511714087] [2021-12-17 00:42:53,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:42:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:42:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:42:53,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:53,309 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:53,329 INFO L93 Difference]: Finished difference Result 172 states and 200 transitions. [2021-12-17 00:42:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:42:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-12-17 00:42:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:53,334 INFO L225 Difference]: With dead ends: 172 [2021-12-17 00:42:53,334 INFO L226 Difference]: Without dead ends: 122 [2021-12-17 00:42:53,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:42:53,335 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:53,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 141 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:42:53,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-17 00:42:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-12-17 00:42:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 102 states have internal predecessors, (117), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 00:42:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-12-17 00:42:53,355 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 70 [2021-12-17 00:42:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:53,355 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-12-17 00:42:53,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-12-17 00:42:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:53,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:53,356 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:53,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:53,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 00:42:53,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 536211579, now seen corresponding path program 1 times [2021-12-17 00:42:53,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:53,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680299323] [2021-12-17 00:42:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:53,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:53,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:53,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982164009] [2021-12-17 00:42:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:53,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:53,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:53,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:53,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 00:42:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:42:53,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 00:42:53,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-17 00:42:54,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:54,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680299323] [2021-12-17 00:42:54,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982164009] [2021-12-17 00:42:54,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982164009] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:54,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:54,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-12-17 00:42:54,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351979222] [2021-12-17 00:42:54,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:54,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:42:54,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:42:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:42:54,026 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:54,212 INFO L93 Difference]: Finished difference Result 197 states and 227 transitions. [2021-12-17 00:42:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:42:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2021-12-17 00:42:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:54,213 INFO L225 Difference]: With dead ends: 197 [2021-12-17 00:42:54,213 INFO L226 Difference]: Without dead ends: 147 [2021-12-17 00:42:54,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:42:54,214 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 20 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:54,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 285 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:42:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-17 00:42:54,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2021-12-17 00:42:54,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 105 states have (on average 1.1333333333333333) internal successors, (119), 103 states have internal predecessors, (119), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:42:54,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2021-12-17 00:42:54,224 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 70 [2021-12-17 00:42:54,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:54,225 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2021-12-17 00:42:54,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:42:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2021-12-17 00:42:54,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 00:42:54,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:54,226 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:54,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 00:42:54,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 00:42:54,436 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash 786086104, now seen corresponding path program 1 times [2021-12-17 00:42:54,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240651853] [2021-12-17 00:42:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:54,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:54,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:54,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929770940] [2021-12-17 00:42:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:54,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:54,445 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:54,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 00:42:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:42:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-17 00:42:54,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-17 00:42:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 00:42:55,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240651853] [2021-12-17 00:42:55,178 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929770940] [2021-12-17 00:42:55,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929770940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:55,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:55,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-12-17 00:42:55,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482575071] [2021-12-17 00:42:55,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:55,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:42:55,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:55,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:42:55,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:42:55,179 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-17 00:42:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:55,842 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2021-12-17 00:42:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-17 00:42:55,843 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 70 [2021-12-17 00:42:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:55,847 INFO L225 Difference]: With dead ends: 312 [2021-12-17 00:42:55,847 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 00:42:55,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-12-17 00:42:55,849 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 79 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 305 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 00:42:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 00:42:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 200. [2021-12-17 00:42:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 165 states have (on average 1.1393939393939394) internal successors, (188), 164 states have internal predecessors, (188), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-17 00:42:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2021-12-17 00:42:55,875 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 70 [2021-12-17 00:42:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:55,876 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2021-12-17 00:42:55,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 17 states have internal predecessors, (60), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-17 00:42:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2021-12-17 00:42:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 00:42:55,877 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:55,877 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:55,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:56,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 00:42:56,100 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:56,100 INFO L85 PathProgramCache]: Analyzing trace with hash 2133417632, now seen corresponding path program 4 times [2021-12-17 00:42:56,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:56,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958870801] [2021-12-17 00:42:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:56,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:56,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796410282] [2021-12-17 00:42:56,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:42:56,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:56,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:56,115 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:56,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 00:42:56,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:42:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:42:56,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:42:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:42:56,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 00:42:56,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958870801] [2021-12-17 00:42:56,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:56,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796410282] [2021-12-17 00:42:56,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796410282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:56,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:56,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:42:56,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899525897] [2021-12-17 00:42:56,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:56,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:42:56,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:56,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:42:56,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:42:56,517 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:42:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:56,818 INFO L93 Difference]: Finished difference Result 379 states and 437 transitions. [2021-12-17 00:42:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:42:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-12-17 00:42:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:56,820 INFO L225 Difference]: With dead ends: 379 [2021-12-17 00:42:56,820 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 00:42:56,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:42:56,821 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 158 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:56,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 176 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:42:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 00:42:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 221. [2021-12-17 00:42:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 186 states have (on average 1.1236559139784945) internal successors, (209), 185 states have internal predecessors, (209), 19 states have call successors, (19), 16 states have call predecessors, (19), 15 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2021-12-17 00:42:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 249 transitions. [2021-12-17 00:42:56,837 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 249 transitions. Word has length 72 [2021-12-17 00:42:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:56,838 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 249 transitions. [2021-12-17 00:42:56,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:42:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 249 transitions. [2021-12-17 00:42:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 00:42:56,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:56,839 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:56,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:57,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:57,043 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:57,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:57,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1215091816, now seen corresponding path program 2 times [2021-12-17 00:42:57,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465503230] [2021-12-17 00:42:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:57,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:57,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350706051] [2021-12-17 00:42:57,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:42:57,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:57,054 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:57,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 00:42:57,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:42:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:42:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:42:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 00:42:57,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 00:42:57,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465503230] [2021-12-17 00:42:57,560 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350706051] [2021-12-17 00:42:57,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350706051] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:57,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:57,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-12-17 00:42:57,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093734188] [2021-12-17 00:42:57,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:57,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:42:57,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:42:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:42:57,562 INFO L87 Difference]: Start difference. First operand 221 states and 249 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:42:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:58,130 INFO L93 Difference]: Finished difference Result 398 states and 449 transitions. [2021-12-17 00:42:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:42:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2021-12-17 00:42:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:58,131 INFO L225 Difference]: With dead ends: 398 [2021-12-17 00:42:58,132 INFO L226 Difference]: Without dead ends: 235 [2021-12-17 00:42:58,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:42:58,133 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:58,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 262 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:42:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-12-17 00:42:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 197. [2021-12-17 00:42:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 170 states have (on average 1.1235294117647059) internal successors, (191), 169 states have internal predecessors, (191), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-12-17 00:42:58,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 222 transitions. [2021-12-17 00:42:58,148 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 222 transitions. Word has length 74 [2021-12-17 00:42:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:58,148 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 222 transitions. [2021-12-17 00:42:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:42:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 222 transitions. [2021-12-17 00:42:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 00:42:58,149 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:58,149 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:58,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 00:42:58,359 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1668772246, now seen corresponding path program 5 times [2021-12-17 00:42:58,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:58,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550359919] [2021-12-17 00:42:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:58,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:58,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:58,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382364405] [2021-12-17 00:42:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:42:58,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:58,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:58,368 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 00:42:58,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-17 00:42:58,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:42:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:42:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:42:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 00:42:58,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:42:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 00:42:58,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:42:58,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550359919] [2021-12-17 00:42:58,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:42:58,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382364405] [2021-12-17 00:42:58,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382364405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:42:58,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:42:58,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-12-17 00:42:58,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084120712] [2021-12-17 00:42:58,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:42:58,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:42:58,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:42:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:42:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:42:58,867 INFO L87 Difference]: Start difference. First operand 197 states and 222 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:42:59,269 INFO L93 Difference]: Finished difference Result 261 states and 289 transitions. [2021-12-17 00:42:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:42:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 77 [2021-12-17 00:42:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:42:59,271 INFO L225 Difference]: With dead ends: 261 [2021-12-17 00:42:59,271 INFO L226 Difference]: Without dead ends: 190 [2021-12-17 00:42:59,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:42:59,272 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 138 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:42:59,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 155 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:42:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-17 00:42:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2021-12-17 00:42:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 155 states have (on average 1.096774193548387) internal successors, (170), 154 states have internal predecessors, (170), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-12-17 00:42:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-12-17 00:42:59,285 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 77 [2021-12-17 00:42:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:42:59,286 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-12-17 00:42:59,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:42:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-12-17 00:42:59,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 00:42:59,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:42:59,287 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:42:59,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:42:59,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 00:42:59,511 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:42:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:42:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 911926688, now seen corresponding path program 6 times [2021-12-17 00:42:59,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:42:59,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867541390] [2021-12-17 00:42:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:42:59,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:42:59,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:42:59,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105652121] [2021-12-17 00:42:59,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:42:59,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:42:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:42:59,528 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:42:59,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-17 00:43:03,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-12-17 00:43:03,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:43:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:43:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:43:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 00:43:03,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:43:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 56 proven. 35 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-17 00:43:03,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:43:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867541390] [2021-12-17 00:43:03,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:43:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105652121] [2021-12-17 00:43:03,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105652121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:43:03,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:43:03,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-12-17 00:43:03,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426048994] [2021-12-17 00:43:03,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:43:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 00:43:03,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:43:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 00:43:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 00:43:03,550 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:43:03,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:43:03,831 INFO L93 Difference]: Finished difference Result 231 states and 251 transitions. [2021-12-17 00:43:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 00:43:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 81 [2021-12-17 00:43:03,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:43:03,832 INFO L225 Difference]: With dead ends: 231 [2021-12-17 00:43:03,833 INFO L226 Difference]: Without dead ends: 183 [2021-12-17 00:43:03,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:43:03,833 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 86 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:43:03,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 161 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:43:03,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-17 00:43:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 174. [2021-12-17 00:43:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 149 states have (on average 1.080536912751678) internal successors, (161), 147 states have internal predecessors, (161), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (15), 15 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-17 00:43:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2021-12-17 00:43:03,846 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 81 [2021-12-17 00:43:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:43:03,846 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2021-12-17 00:43:03,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:43:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2021-12-17 00:43:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-17 00:43:03,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:43:03,848 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:43:03,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:43:04,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-17 00:43:04,055 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:43:04,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:43:04,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1054227458, now seen corresponding path program 1 times [2021-12-17 00:43:04,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:43:04,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405541161] [2021-12-17 00:43:04,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:43:04,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:43:04,062 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:43:04,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807717707] [2021-12-17 00:43:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:43:04,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:43:04,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:43:04,063 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:43:04,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-17 00:43:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:43:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-17 00:43:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:43:05,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:43:05,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 00:43:05,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-17 00:43:05,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 72 [2021-12-17 00:43:05,201 INFO L354 Elim1Store]: treesize reduction 148, result has 19.1 percent of original size [2021-12-17 00:43:05,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 95 [2021-12-17 00:43:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2021-12-17 00:43:05,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 86 [2021-12-17 00:43:05,514 INFO L354 Elim1Store]: treesize reduction 307, result has 17.0 percent of original size [2021-12-17 00:43:05,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 126 [2021-12-17 00:43:05,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 22 [2021-12-17 00:43:05,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:43:05,760 INFO L354 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2021-12-17 00:43:05,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:43:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:43:05,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 30 [2021-12-17 00:43:37,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 94 [2021-12-17 00:43:38,022 INFO L354 Elim1Store]: treesize reduction 403, result has 29.8 percent of original size [2021-12-17 00:43:38,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 93 treesize of output 244 [2021-12-17 00:43:38,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:43:38,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:43:38,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:43:39,144 INFO L354 Elim1Store]: treesize reduction 150, result has 22.3 percent of original size [2021-12-17 00:43:39,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 331 treesize of output 308 [2021-12-17 00:44:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 339 [2021-12-17 00:44:02,352 INFO L354 Elim1Store]: treesize reduction 1462, result has 17.0 percent of original size [2021-12-17 00:44:02,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 342 treesize of output 527 [2021-12-17 00:44:02,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 32 [2021-12-17 00:44:02,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:44:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 34 [2021-12-17 00:44:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:02,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 39 [2021-12-17 00:44:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:44:03,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 278 [2021-12-17 00:44:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:03,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 565 treesize of output 427 [2021-12-17 00:45:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 247 treesize of output 214 [2021-12-17 00:45:44,793 INFO L354 Elim1Store]: treesize reduction 850, result has 26.4 percent of original size [2021-12-17 00:45:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 213 treesize of output 425 [2021-12-17 00:45:53,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:45:56,838 INFO L354 Elim1Store]: treesize reduction 350, result has 26.3 percent of original size [2021-12-17 00:45:56,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 883 treesize of output 683 [2021-12-17 00:51:35,507 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 101 [2021-12-17 00:51:35,507 WARN L228 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-12-17 00:51:35,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405541161] [2021-12-17 00:51:35,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807717707] [2021-12-17 00:51:35,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-12-17 00:51:35,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:35,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 00:51:35,508 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 00:51:35,508 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 00:51:35,514 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 00:51:35,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:35,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:35,726 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:35,728 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 00:51:35,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:51:35 BoogieIcfgContainer [2021-12-17 00:51:35,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 00:51:35,749 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 00:51:35,749 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 00:51:35,749 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 00:51:35,750 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:39:55" (3/4) ... [2021-12-17 00:51:35,752 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 00:51:35,752 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 00:51:35,752 INFO L158 Benchmark]: Toolchain (without parser) took 700361.54ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 64.2MB in the beginning and 36.6MB in the end (delta: 27.6MB). Peak memory consumption was 69.6MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,753 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:51:35,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 221.99ms. Allocated memory is still 94.4MB. Free memory was 64.0MB in the beginning and 70.0MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,753 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.81ms. Allocated memory is still 94.4MB. Free memory was 70.0MB in the beginning and 68.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:51:35,753 INFO L158 Benchmark]: Boogie Preprocessor took 43.02ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 66.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,754 INFO L158 Benchmark]: RCFGBuilder took 271.77ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 55.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,754 INFO L158 Benchmark]: TraceAbstraction took 699763.43ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 54.7MB in the beginning and 37.6MB in the end (delta: 17.0MB). Peak memory consumption was 60.0MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,754 INFO L158 Benchmark]: Witness Printer took 2.99ms. Allocated memory is still 136.3MB. Free memory was 37.6MB in the beginning and 36.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:51:35,755 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 94.4MB. Free memory is still 53.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 221.99ms. Allocated memory is still 94.4MB. Free memory was 64.0MB in the beginning and 70.0MB in the end (delta: -6.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.81ms. Allocated memory is still 94.4MB. Free memory was 70.0MB in the beginning and 68.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 43.02ms. Allocated memory is still 94.4MB. Free memory was 68.3MB in the beginning and 66.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 271.77ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 55.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 699763.43ms. Allocated memory was 94.4MB in the beginning and 136.3MB in the end (delta: 41.9MB). Free memory was 54.7MB in the beginning and 37.6MB in the end (delta: 17.0MB). Peak memory consumption was 60.0MB. Max. memory is 16.1GB. * Witness Printer took 2.99ms. Allocated memory is still 136.3MB. Free memory was 37.6MB in the beginning and 36.6MB in the end (delta: 1.1MB). 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 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L49] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L50] CALL assume_abort_if_not(ARR_SIZE > 1) [L31] COND FALSE !(!cond) [L50] RET assume_abort_if_not(ARR_SIZE > 1) [L52] int array[ARR_SIZE][ARR_SIZE] ; [L54] int row = 0, column = 0, num = -1 ; [L55] signed long long sum = 0 ; [L56] int temp ; [L57] short index1,index2 ; [L59] row=0 [L59] COND TRUE row=0 && index1 < ARR_SIZE) [L31] COND FALSE !(!cond) [L68] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L69] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND FALSE !(!cond) [L69] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L72] CALL, EXPR outerBoundaryPatternCheck(index2) [L41] COND TRUE (index == 0) || (index == ARR_SIZE-1) [L42] return 1 ; [L72] RET, EXPR outerBoundaryPatternCheck(index2) [L72] EXPR (outerBoundaryPatternCheck(index2)) ? (num*num) : array[index1][index2] [L72] array[index1][index2] = (outerBoundaryPatternCheck(index2)) ? (num*num) : array[index1][index2] [L73] CALL, EXPR outerBoundaryPatternCheck(index2) [L41] COND TRUE (index == 0) || (index == ARR_SIZE-1) [L42] return 1 ; [L73] RET, EXPR outerBoundaryPatternCheck(index2) [L73] EXPR (outerBoundaryPatternCheck(index2)) ? num : array[index1][ARR_SIZE-1-index2] [L73] array[index1][ARR_SIZE-1-index2] = (outerBoundaryPatternCheck(index2)) ? num : array[index1][ARR_SIZE-1-index2] [L76] temp = __VERIFIER_nondet_int() [L77] COND FALSE !(temp == 0) [L63] COND TRUE 1 [L66] index1 = __VERIFIER_nondet_short() [L67] index2 = __VERIFIER_nondet_short() [L68] CALL assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L31] COND FALSE !(!cond) [L68] RET assume_abort_if_not(index1>=0 && index1 < ARR_SIZE) [L69] CALL assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L31] COND FALSE !(!cond) [L69] RET assume_abort_if_not(index2>=0 && index2 < ARR_SIZE) [L72] CALL, EXPR outerBoundaryPatternCheck(index2) [L41] COND TRUE (index == 0) || (index == ARR_SIZE-1) [L42] return 1 ; [L72] RET, EXPR outerBoundaryPatternCheck(index2) [L72] EXPR (outerBoundaryPatternCheck(index2)) ? (num*num) : array[index1][index2] [L72] array[index1][index2] = (outerBoundaryPatternCheck(index2)) ? (num*num) : array[index1][index2] [L73] CALL, EXPR outerBoundaryPatternCheck(index2) [L41] COND TRUE (index == 0) || (index == ARR_SIZE-1) [L42] return 1 ; [L73] RET, EXPR outerBoundaryPatternCheck(index2) [L73] EXPR (outerBoundaryPatternCheck(index2)) ? num : array[index1][ARR_SIZE-1-index2] [L73] array[index1][ARR_SIZE-1-index2] = (outerBoundaryPatternCheck(index2)) ? num : array[index1][ARR_SIZE-1-index2] [L76] temp = __VERIFIER_nondet_int() [L77] COND TRUE temp == 0 [L80] row=0 [L80] COND TRUE row 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 -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2021-12-17 00:51:37,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:51:37,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:51:37,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:51:37,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:51:37,952 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:51:37,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array22_pattern.c [2021-12-17 00:51:38,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0c8e66b/1ce00ff52870414a933f02c6888384c1/FLAG194f11631 [2021-12-17 00:51:38,415 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:51:38,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c [2021-12-17 00:51:38,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0c8e66b/1ce00ff52870414a933f02c6888384c1/FLAG194f11631 [2021-12-17 00:51:38,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0c8e66b/1ce00ff52870414a933f02c6888384c1 [2021-12-17 00:51:38,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:51:38,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:51:38,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:51:38,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:51:38,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:51:38,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:51:38" (1/1) ... [2021-12-17 00:51:38,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37841e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:38, skipping insertion in model container [2021-12-17 00:51:38,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:51:38" (1/1) ... [2021-12-17 00:51:38,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:51:38,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:51:38,967 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-12-17 00:51:38,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:51:39,000 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:51:39,051 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2021-12-17 00:51:39,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:51:39,086 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:51:39,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39 WrapperNode [2021-12-17 00:51:39,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:51:39,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:51:39,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:51:39,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:51:39,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,133 INFO L137 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2021-12-17 00:51:39,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:51:39,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:51:39,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:51:39,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:51:39,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:51:39,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:51:39,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:51:39,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:51:39,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (1/1) ... [2021-12-17 00:51:39,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:51:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:39,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:51:39,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:51:39,247 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-12-17 00:51:39,247 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-12-17 00:51:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:51:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:51:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 00:51:39,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 00:51:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:51:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:51:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:51:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:51:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:51:39,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:51:39,331 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:51:39,333 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:51:39,694 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:51:39,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:51:39,699 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-17 00:51:39,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:51:39 BoogieIcfgContainer [2021-12-17 00:51:39,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:51:39,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:51:39,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:51:39,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:51:39,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:51:38" (1/3) ... [2021-12-17 00:51:39,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49484c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:51:39, skipping insertion in model container [2021-12-17 00:51:39,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:39" (2/3) ... [2021-12-17 00:51:39,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49484c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:51:39, skipping insertion in model container [2021-12-17 00:51:39,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:51:39" (3/3) ... [2021-12-17 00:51:39,708 INFO L111 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2021-12-17 00:51:39,713 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:51:39,713 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:51:39,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:51:39,768 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:51:39,769 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:51:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:51:39,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:39,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:39,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1776900022, now seen corresponding path program 1 times [2021-12-17 00:51:39,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:39,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502223909] [2021-12-17 00:51:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:39,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:39,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:39,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:39,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:51:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:51:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:51:39,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:39,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:39,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502223909] [2021-12-17 00:51:39,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502223909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:39,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:39,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:51:39,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362173963] [2021-12-17 00:51:39,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:39,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:51:39,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:51:39,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:51:39,970 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-17 00:51:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:39,992 INFO L93 Difference]: Finished difference Result 75 states and 113 transitions. [2021-12-17 00:51:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:51:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15 [2021-12-17 00:51:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:39,999 INFO L225 Difference]: With dead ends: 75 [2021-12-17 00:51:39,999 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 00:51:40,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:51:40,004 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:40,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 00:51:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-17 00:51:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-12-17 00:51:40,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 15 [2021-12-17 00:51:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:40,036 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-12-17 00:51:40,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2021-12-17 00:51:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-12-17 00:51:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 00:51:40,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:40,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:40,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-17 00:51:40,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:40,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 136661359, now seen corresponding path program 1 times [2021-12-17 00:51:40,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157803025] [2021-12-17 00:51:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:40,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:40,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:40,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:51:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:51:40,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:51:40,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:40,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:40,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157803025] [2021-12-17 00:51:40,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157803025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:40,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:40,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:40,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099774520] [2021-12-17 00:51:40,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:40,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:40,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:40,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:40,493 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:40,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:40,551 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-12-17 00:51:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-12-17 00:51:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:40,556 INFO L225 Difference]: With dead ends: 42 [2021-12-17 00:51:40,556 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 00:51:40,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:51:40,561 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:40,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 106 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 00:51:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 00:51:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-17 00:51:40,571 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 40 [2021-12-17 00:51:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:40,578 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-17 00:51:40,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-17 00:51:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:51:40,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:40,581 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:40,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:40,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:40,781 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:40,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1379198517, now seen corresponding path program 1 times [2021-12-17 00:51:40,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511191465] [2021-12-17 00:51:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:40,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:40,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:40,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:40,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:51:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:51:40,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:51:41,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:41,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:41,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511191465] [2021-12-17 00:51:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511191465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:41,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:41,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:51:41,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374677300] [2021-12-17 00:51:41,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:41,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:51:41,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:51:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:51:41,129 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:41,139 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-12-17 00:51:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:51:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-12-17 00:51:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:41,141 INFO L225 Difference]: With dead ends: 73 [2021-12-17 00:51:41,141 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 00:51:41,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:51:41,142 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:41,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 132 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 59 Unchecked, 0.0s Time] [2021-12-17 00:51:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 00:51:41,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-17 00:51:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-12-17 00:51:41,149 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 45 [2021-12-17 00:51:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:41,149 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-12-17 00:51:41,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:41,150 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-12-17 00:51:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 00:51:41,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:41,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:41,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:41,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:41,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 718774395, now seen corresponding path program 1 times [2021-12-17 00:51:41,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713675100] [2021-12-17 00:51:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:41,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:41,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:41,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:51:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:41,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:51:41,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:51:41,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:41,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:41,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713675100] [2021-12-17 00:51:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713675100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:41,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 00:51:41,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858446203] [2021-12-17 00:51:41,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:41,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 00:51:41,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 00:51:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:51:41,707 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:41,716 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-12-17 00:51:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:51:41,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 48 [2021-12-17 00:51:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:41,718 INFO L225 Difference]: With dead ends: 78 [2021-12-17 00:51:41,718 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 00:51:41,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:51:41,719 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:41,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 136 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 71 Unchecked, 0.0s Time] [2021-12-17 00:51:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 00:51:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 00:51:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-12-17 00:51:41,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 48 [2021-12-17 00:51:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:41,726 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-12-17 00:51:41,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-12-17 00:51:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 00:51:41,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:41,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:41,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:41,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:41,938 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:41,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:41,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1173811335, now seen corresponding path program 1 times [2021-12-17 00:51:41,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:41,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896750470] [2021-12-17 00:51:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:41,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:41,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:41,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:41,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:51:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:42,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:51:42,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:51:42,583 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:42,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896750470] [2021-12-17 00:51:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896750470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:42,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:42,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-17 00:51:42,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364103998] [2021-12-17 00:51:42,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 00:51:42,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 00:51:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:42,585 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:42,777 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-12-17 00:51:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:51:42,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 50 [2021-12-17 00:51:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:42,779 INFO L225 Difference]: With dead ends: 80 [2021-12-17 00:51:42,779 INFO L226 Difference]: Without dead ends: 46 [2021-12-17 00:51:42,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:42,780 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:42,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 120 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-12-17 00:51:42,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-17 00:51:42,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-17 00:51:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-17 00:51:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-17 00:51:42,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 50 [2021-12-17 00:51:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:42,793 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-17 00:51:42,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:42,794 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-17 00:51:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:42,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:42,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:42,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:43,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:43,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1117435639, now seen corresponding path program 2 times [2021-12-17 00:51:43,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:43,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857245630] [2021-12-17 00:51:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:51:43,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:43,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:43,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:51:43,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:51:43,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:43,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:51:43,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:51:43,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:43,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857245630] [2021-12-17 00:51:43,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857245630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:43,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:43,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-17 00:51:43,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223017711] [2021-12-17 00:51:43,856 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:43,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 00:51:43,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:43,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 00:51:43,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:43,857 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:51:44,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:44,227 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2021-12-17 00:51:44,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:51:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 52 [2021-12-17 00:51:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:44,238 INFO L225 Difference]: With dead ends: 125 [2021-12-17 00:51:44,238 INFO L226 Difference]: Without dead ends: 121 [2021-12-17 00:51:44,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:51:44,239 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:44,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 197 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2021-12-17 00:51:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-17 00:51:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2021-12-17 00:51:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 62 states have internal predecessors, (80), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-12-17 00:51:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2021-12-17 00:51:44,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 52 [2021-12-17 00:51:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:44,254 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 108 transitions. [2021-12-17 00:51:44,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:51:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 108 transitions. [2021-12-17 00:51:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:44,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:44,256 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:44,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:44,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:44,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:44,468 INFO L85 PathProgramCache]: Analyzing trace with hash 530629625, now seen corresponding path program 1 times [2021-12-17 00:51:44,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034160220] [2021-12-17 00:51:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:44,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:44,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:44,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:44,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:51:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:51:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 00:51:44,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:44,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:44,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034160220] [2021-12-17 00:51:44,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034160220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:44,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:44,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:44,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783648342] [2021-12-17 00:51:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:44,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:44,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:44,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:44,635 INFO L87 Difference]: Start difference. First operand 81 states and 108 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:51:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:44,672 INFO L93 Difference]: Finished difference Result 117 states and 157 transitions. [2021-12-17 00:51:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:44,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2021-12-17 00:51:44,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:44,675 INFO L225 Difference]: With dead ends: 117 [2021-12-17 00:51:44,676 INFO L226 Difference]: Without dead ends: 87 [2021-12-17 00:51:44,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:44,677 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:44,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-17 00:51:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-12-17 00:51:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (19), 15 states have call predecessors, (19), 13 states have call successors, (19) [2021-12-17 00:51:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 114 transitions. [2021-12-17 00:51:44,696 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 114 transitions. Word has length 52 [2021-12-17 00:51:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:44,696 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 114 transitions. [2021-12-17 00:51:44,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:51:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 114 transitions. [2021-12-17 00:51:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:44,699 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:44,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:44,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:44,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:44,910 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash 20095448, now seen corresponding path program 1 times [2021-12-17 00:51:44,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:44,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630208985] [2021-12-17 00:51:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:44,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:44,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:44,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:44,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:51:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 00:51:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 00:51:45,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630208985] [2021-12-17 00:51:45,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630208985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:45,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:45,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-12-17 00:51:45,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43856981] [2021-12-17 00:51:45,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:45,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:51:45,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:51:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:51:45,645 INFO L87 Difference]: Start difference. First operand 85 states and 114 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:46,001 INFO L93 Difference]: Finished difference Result 172 states and 235 transitions. [2021-12-17 00:51:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:51:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-17 00:51:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:46,003 INFO L225 Difference]: With dead ends: 172 [2021-12-17 00:51:46,003 INFO L226 Difference]: Without dead ends: 121 [2021-12-17 00:51:46,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:51:46,004 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:46,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 140 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:51:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-17 00:51:46,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-12-17 00:51:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 70 states have internal predecessors, (92), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 15 states have call successors, (20) [2021-12-17 00:51:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 127 transitions. [2021-12-17 00:51:46,018 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 127 transitions. Word has length 52 [2021-12-17 00:51:46,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:46,018 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 127 transitions. [2021-12-17 00:51:46,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 127 transitions. [2021-12-17 00:51:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:46,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:46,020 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:46,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-17 00:51:46,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:46,231 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:46,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:46,231 INFO L85 PathProgramCache]: Analyzing trace with hash 299787189, now seen corresponding path program 1 times [2021-12-17 00:51:46,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:46,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041694432] [2021-12-17 00:51:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:46,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:46,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:46,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:51:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:51:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:46,373 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:51:46,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:46,373 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:46,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041694432] [2021-12-17 00:51:46,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041694432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:46,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:46,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:46,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902969710] [2021-12-17 00:51:46,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:46,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:46,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:46,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:46,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:46,376 INFO L87 Difference]: Start difference. First operand 95 states and 127 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:46,421 INFO L93 Difference]: Finished difference Result 133 states and 176 transitions. [2021-12-17 00:51:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-17 00:51:46,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:46,424 INFO L225 Difference]: With dead ends: 133 [2021-12-17 00:51:46,424 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 00:51:46,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:46,425 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:46,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:46,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 00:51:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-17 00:51:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 70 states have internal predecessors, (89), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (20), 17 states have call predecessors, (20), 15 states have call successors, (20) [2021-12-17 00:51:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2021-12-17 00:51:46,437 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 52 [2021-12-17 00:51:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:46,437 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2021-12-17 00:51:46,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2021-12-17 00:51:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:46,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:46,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:46,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:46,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:46,648 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1264859929, now seen corresponding path program 1 times [2021-12-17 00:51:46,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:46,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849264195] [2021-12-17 00:51:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:46,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:46,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:46,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:51:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:51:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:51:46,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:46,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:46,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849264195] [2021-12-17 00:51:46,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849264195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:46,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:46,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:46,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526277268] [2021-12-17 00:51:46,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:46,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:46,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:46,809 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:46,854 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2021-12-17 00:51:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-17 00:51:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:46,857 INFO L225 Difference]: With dead ends: 141 [2021-12-17 00:51:46,857 INFO L226 Difference]: Without dead ends: 82 [2021-12-17 00:51:46,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:46,858 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:46,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-17 00:51:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-12-17 00:51:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.1875) internal successors, (76), 62 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 00:51:46,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2021-12-17 00:51:46,865 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 52 [2021-12-17 00:51:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:46,865 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2021-12-17 00:51:46,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:46,866 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2021-12-17 00:51:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:46,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:46,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:46,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:47,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:47,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:47,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:47,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1544551670, now seen corresponding path program 1 times [2021-12-17 00:51:47,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:47,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774066023] [2021-12-17 00:51:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:47,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:47,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:47,082 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:47,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:51:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:47,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 00:51:47,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 00:51:47,745 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774066023] [2021-12-17 00:51:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774066023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:47,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:47,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-12-17 00:51:47,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423227276] [2021-12-17 00:51:47,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:47,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:51:47,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:51:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:51:47,746 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:48,181 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2021-12-17 00:51:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:51:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-12-17 00:51:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:48,183 INFO L225 Difference]: With dead ends: 136 [2021-12-17 00:51:48,183 INFO L226 Difference]: Without dead ends: 98 [2021-12-17 00:51:48,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:51:48,184 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:48,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 220 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:51:48,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-17 00:51:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2021-12-17 00:51:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 63 states have internal predecessors, (78), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:51:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2021-12-17 00:51:48,192 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 52 [2021-12-17 00:51:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:48,192 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2021-12-17 00:51:48,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 00:51:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2021-12-17 00:51:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:48,193 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:48,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:48,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:48,404 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1034017493, now seen corresponding path program 1 times [2021-12-17 00:51:48,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599356352] [2021-12-17 00:51:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:48,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:48,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:48,406 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:48,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:51:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:51:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-17 00:51:48,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:48,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:48,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599356352] [2021-12-17 00:51:48,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599356352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:48,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:48,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:48,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775925878] [2021-12-17 00:51:48,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:48,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:48,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:48,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:48,561 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:51:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:48,605 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2021-12-17 00:51:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 52 [2021-12-17 00:51:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:48,607 INFO L225 Difference]: With dead ends: 124 [2021-12-17 00:51:48,607 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 00:51:48,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:48,608 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:48,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 136 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 00:51:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-12-17 00:51:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 63 states have internal predecessors, (77), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:51:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-12-17 00:51:48,614 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 52 [2021-12-17 00:51:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:48,615 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-12-17 00:51:48,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 00:51:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-12-17 00:51:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 00:51:48,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:48,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:48,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:48,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:48,826 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:48,826 INFO L85 PathProgramCache]: Analyzing trace with hash 447211479, now seen corresponding path program 1 times [2021-12-17 00:51:48,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:48,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535676456] [2021-12-17 00:51:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:48,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:48,828 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:48,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:51:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:48,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:51:48,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:51:49,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:51:49,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:49,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535676456] [2021-12-17 00:51:49,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535676456] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:49,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:49,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-12-17 00:51:49,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135712020] [2021-12-17 00:51:49,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:49,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 00:51:49,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:49,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 00:51:49,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:51:49,710 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:50,051 INFO L93 Difference]: Finished difference Result 161 states and 197 transitions. [2021-12-17 00:51:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:51:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 52 [2021-12-17 00:51:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:50,054 INFO L225 Difference]: With dead ends: 161 [2021-12-17 00:51:50,054 INFO L226 Difference]: Without dead ends: 94 [2021-12-17 00:51:50,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-12-17 00:51:50,055 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:50,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 183 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2021-12-17 00:51:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-17 00:51:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-12-17 00:51:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 74 states have internal predecessors, (92), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:51:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2021-12-17 00:51:50,062 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 52 [2021-12-17 00:51:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:50,062 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2021-12-17 00:51:50,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2021-12-17 00:51:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 00:51:50,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:50,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:50,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:50,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:50,274 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:50,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1531261273, now seen corresponding path program 2 times [2021-12-17 00:51:50,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:50,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11212556] [2021-12-17 00:51:50,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:51:50,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:50,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:50,276 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:50,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 00:51:50,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:51:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 00:51:50,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:51:50,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11212556] [2021-12-17 00:51:50,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11212556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:50,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:50,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-17 00:51:50,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732354330] [2021-12-17 00:51:50,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:50,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 00:51:50,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 00:51:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:50,994 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:51:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:51,234 INFO L93 Difference]: Finished difference Result 147 states and 183 transitions. [2021-12-17 00:51:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:51:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2021-12-17 00:51:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:51,236 INFO L225 Difference]: With dead ends: 147 [2021-12-17 00:51:51,236 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 00:51:51,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:51:51,237 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:51,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 159 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2021-12-17 00:51:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 00:51:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2021-12-17 00:51:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-17 00:51:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-12-17 00:51:51,245 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 55 [2021-12-17 00:51:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:51,245 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-12-17 00:51:51,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:51:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-12-17 00:51:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 00:51:51,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:51,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:51,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:51,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:51,447 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 912116525, now seen corresponding path program 3 times [2021-12-17 00:51:51,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:51,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799405771] [2021-12-17 00:51:51,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:51:51,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:51,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:51,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 00:51:51,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 00:51:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:51:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-17 00:51:51,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 00:51:52,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:52,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799405771] [2021-12-17 00:51:52,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799405771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:52,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:52,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-12-17 00:51:52,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49155836] [2021-12-17 00:51:52,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:52,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 00:51:52,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 00:51:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:52,103 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:52,266 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2021-12-17 00:51:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:51:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-12-17 00:51:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:52,268 INFO L225 Difference]: With dead ends: 120 [2021-12-17 00:51:52,268 INFO L226 Difference]: Without dead ends: 109 [2021-12-17 00:51:52,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:51:52,269 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 191 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2021-12-17 00:51:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-17 00:51:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-12-17 00:51:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 79 states have internal predecessors, (98), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-12-17 00:51:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 120 transitions. [2021-12-17 00:51:52,282 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 120 transitions. Word has length 58 [2021-12-17 00:51:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:52,282 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 120 transitions. [2021-12-17 00:51:52,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 120 transitions. [2021-12-17 00:51:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 00:51:52,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:52,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:52,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:52,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:52,491 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:52,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1726268137, now seen corresponding path program 4 times [2021-12-17 00:51:52,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:52,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232382470] [2021-12-17 00:51:52,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:51:52,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:52,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:52,494 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:52,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 00:51:52,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:51:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:51:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:51:52,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 00:51:53,137 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:53,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232382470] [2021-12-17 00:51:53,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232382470] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:53,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:53,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-12-17 00:51:53,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804985263] [2021-12-17 00:51:53,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:53,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:51:53,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:51:53,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:51:53,139 INFO L87 Difference]: Start difference. First operand 99 states and 120 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:53,570 INFO L93 Difference]: Finished difference Result 202 states and 251 transitions. [2021-12-17 00:51:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 00:51:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-12-17 00:51:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:53,574 INFO L225 Difference]: With dead ends: 202 [2021-12-17 00:51:53,574 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 00:51:53,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:51:53,575 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 32 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:53,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 138 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2021-12-17 00:51:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 00:51:53,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-12-17 00:51:53,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 99 states have (on average 1.202020202020202) internal successors, (119), 97 states have internal predecessors, (119), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-17 00:51:53,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2021-12-17 00:51:53,585 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 58 [2021-12-17 00:51:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:53,585 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2021-12-17 00:51:53,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 3 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 00:51:53,585 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2021-12-17 00:51:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 00:51:53,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:53,586 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:53,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:53,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:51:53,798 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:53,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:53,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1199480847, now seen corresponding path program 5 times [2021-12-17 00:51:53,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:51:53,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621135267] [2021-12-17 00:51:53,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:51:53,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:51:53,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:51:53,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:51:53,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 00:51:53,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-17 00:51:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:51:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:54,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:51:54,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:54,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 00:51:54,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:51:54,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621135267] [2021-12-17 00:51:54,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621135267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:54,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:54,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-17 00:51:54,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905069369] [2021-12-17 00:51:54,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:54,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-17 00:51:54,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:51:54,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-17 00:51:54,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:51:54,904 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:52:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:02,389 INFO L93 Difference]: Finished difference Result 302 states and 384 transitions. [2021-12-17 00:52:02,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-17 00:52:02,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 61 [2021-12-17 00:52:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:02,391 INFO L225 Difference]: With dead ends: 302 [2021-12-17 00:52:02,391 INFO L226 Difference]: Without dead ends: 230 [2021-12-17 00:52:02,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=909, Invalid=2283, Unknown=0, NotChecked=0, Total=3192 [2021-12-17 00:52:02,393 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 303 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:02,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 279 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 00:52:02,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-17 00:52:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 165. [2021-12-17 00:52:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 152 states have (on average 1.2960526315789473) internal successors, (197), 151 states have internal predecessors, (197), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-17 00:52:02,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 212 transitions. [2021-12-17 00:52:02,406 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 212 transitions. Word has length 61 [2021-12-17 00:52:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:02,407 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 212 transitions. [2021-12-17 00:52:02,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 24 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 00:52:02,407 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 212 transitions. [2021-12-17 00:52:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 00:52:02,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:02,408 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:02,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:02,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:02,618 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:02,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:02,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1139333613, now seen corresponding path program 6 times [2021-12-17 00:52:02,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:02,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024109405] [2021-12-17 00:52:02,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:52:02,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:02,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:02,620 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 00:52:02,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:52:02,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:02,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:52:02,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 00:52:03,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 00:52:03,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:03,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024109405] [2021-12-17 00:52:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024109405] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:03,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:03,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-12-17 00:52:03,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678550037] [2021-12-17 00:52:03,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:03,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:52:03,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:52:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:52:03,542 INFO L87 Difference]: Start difference. First operand 165 states and 212 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:03,809 INFO L93 Difference]: Finished difference Result 220 states and 283 transitions. [2021-12-17 00:52:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:52:03,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-12-17 00:52:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:03,812 INFO L225 Difference]: With dead ends: 220 [2021-12-17 00:52:03,812 INFO L226 Difference]: Without dead ends: 195 [2021-12-17 00:52:03,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:52:03,813 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:03,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 175 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 116 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2021-12-17 00:52:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-12-17 00:52:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-12-17 00:52:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 174 states have (on average 1.2758620689655173) internal successors, (222), 172 states have internal predecessors, (222), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-17 00:52:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 246 transitions. [2021-12-17 00:52:03,828 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 246 transitions. Word has length 62 [2021-12-17 00:52:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 246 transitions. [2021-12-17 00:52:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 246 transitions. [2021-12-17 00:52:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 00:52:03,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:03,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:03,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:04,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:04,041 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 657351467, now seen corresponding path program 7 times [2021-12-17 00:52:04,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:04,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46398890] [2021-12-17 00:52:04,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:52:04,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:04,043 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:04,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 00:52:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:04,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:52:04,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 00:52:04,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-17 00:52:04,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:04,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46398890] [2021-12-17 00:52:04,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46398890] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:04,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:04,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-12-17 00:52:04,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996988444] [2021-12-17 00:52:04,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:04,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:52:04,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:04,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:52:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:52:04,924 INFO L87 Difference]: Start difference. First operand 193 states and 246 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:05,369 INFO L93 Difference]: Finished difference Result 361 states and 470 transitions. [2021-12-17 00:52:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:52:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-12-17 00:52:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:05,374 INFO L225 Difference]: With dead ends: 361 [2021-12-17 00:52:05,374 INFO L226 Difference]: Without dead ends: 332 [2021-12-17 00:52:05,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-12-17 00:52:05,375 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 212 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:05,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 118 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 66 Invalid, 0 Unknown, 202 Unchecked, 0.3s Time] [2021-12-17 00:52:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-17 00:52:05,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 291. [2021-12-17 00:52:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 264 states have (on average 1.2613636363636365) internal successors, (333), 260 states have internal predecessors, (333), 16 states have call successors, (16), 13 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-17 00:52:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 368 transitions. [2021-12-17 00:52:05,404 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 368 transitions. Word has length 64 [2021-12-17 00:52:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:05,405 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 368 transitions. [2021-12-17 00:52:05,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 368 transitions. [2021-12-17 00:52:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 00:52:05,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:05,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:05,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:05,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:05,616 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash 121197131, now seen corresponding path program 3 times [2021-12-17 00:52:05,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:05,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374017790] [2021-12-17 00:52:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:52:05,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:05,618 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:05,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 00:52:05,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 00:52:05,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:05,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 00:52:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:52:06,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 00:52:06,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:06,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374017790] [2021-12-17 00:52:06,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374017790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:06,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:06,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-12-17 00:52:06,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572390811] [2021-12-17 00:52:06,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:52:06,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:52:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:52:06,554 INFO L87 Difference]: Start difference. First operand 291 states and 368 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:07,575 INFO L93 Difference]: Finished difference Result 426 states and 543 transitions. [2021-12-17 00:52:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 00:52:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-12-17 00:52:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:07,578 INFO L225 Difference]: With dead ends: 426 [2021-12-17 00:52:07,578 INFO L226 Difference]: Without dead ends: 400 [2021-12-17 00:52:07,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2021-12-17 00:52:07,579 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:07,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 167 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 116 Invalid, 0 Unknown, 226 Unchecked, 0.3s Time] [2021-12-17 00:52:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-17 00:52:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 321. [2021-12-17 00:52:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 284 states have (on average 1.2535211267605635) internal successors, (356), 279 states have internal predecessors, (356), 23 states have call successors, (23), 18 states have call predecessors, (23), 13 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2021-12-17 00:52:07,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 407 transitions. [2021-12-17 00:52:07,610 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 407 transitions. Word has length 64 [2021-12-17 00:52:07,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:07,610 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 407 transitions. [2021-12-17 00:52:07,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 407 transitions. [2021-12-17 00:52:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 00:52:07,612 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:07,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:07,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:07,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:07,823 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -979424791, now seen corresponding path program 8 times [2021-12-17 00:52:07,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156045638] [2021-12-17 00:52:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:52:07,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:07,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:07,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:07,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 00:52:07,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:52:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:52:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 00:52:08,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:52:08,533 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:08,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156045638] [2021-12-17 00:52:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156045638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:08,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:08,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-12-17 00:52:08,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626000860] [2021-12-17 00:52:08,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:08,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:52:08,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:52:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:52:08,535 INFO L87 Difference]: Start difference. First operand 321 states and 407 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:09,138 INFO L93 Difference]: Finished difference Result 808 states and 1032 transitions. [2021-12-17 00:52:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:52:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-12-17 00:52:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:09,144 INFO L225 Difference]: With dead ends: 808 [2021-12-17 00:52:09,144 INFO L226 Difference]: Without dead ends: 565 [2021-12-17 00:52:09,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:52:09,145 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 71 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:09,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 309 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 185 Invalid, 0 Unknown, 184 Unchecked, 0.4s Time] [2021-12-17 00:52:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-17 00:52:09,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 456. [2021-12-17 00:52:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 392 states have (on average 1.2372448979591837) internal successors, (485), 381 states have internal predecessors, (485), 44 states have call successors, (44), 29 states have call predecessors, (44), 19 states have return successors, (54), 45 states have call predecessors, (54), 44 states have call successors, (54) [2021-12-17 00:52:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 583 transitions. [2021-12-17 00:52:09,190 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 583 transitions. Word has length 66 [2021-12-17 00:52:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 583 transitions. [2021-12-17 00:52:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-12-17 00:52:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 583 transitions. [2021-12-17 00:52:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 00:52:09,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:09,194 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:09,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:09,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:09,407 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:09,407 INFO L85 PathProgramCache]: Analyzing trace with hash 986341039, now seen corresponding path program 9 times [2021-12-17 00:52:09,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:09,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3016007] [2021-12-17 00:52:09,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:52:09,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:09,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:09,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 00:52:09,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 00:52:09,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:09,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 00:52:09,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:09,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-17 00:52:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:10,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-12-17 00:52:10,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:10,609 INFO L354 Elim1Store]: treesize reduction 129, result has 20.9 percent of original size [2021-12-17 00:52:10,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 57 [2021-12-17 00:52:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:11,040 INFO L354 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2021-12-17 00:52:11,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 57 [2021-12-17 00:52:19,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:52:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:52:19,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:19,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:53:28,550 WARN L227 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 144 DAG size of output: 86 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 00:53:28,552 INFO L354 Elim1Store]: treesize reduction 344, result has 54.3 percent of original size [2021-12-17 00:53:28,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 118 treesize of output 454 Killed by 15