./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:08:26,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:08:26,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:08:26,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:08:26,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:08:26,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:08:26,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:08:26,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:08:26,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:08:26,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:08:26,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:08:26,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:08:26,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:08:26,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:08:26,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:08:26,759 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:08:26,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:08:26,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:08:26,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:08:26,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:08:26,769 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:08:26,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:08:26,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:08:26,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:08:26,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:08:26,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:08:26,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:08:26,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:08:26,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:08:26,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:08:26,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:08:26,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:08:26,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:08:26,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:08:26,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:08:26,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:08:26,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:08:26,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:08:26,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:08:26,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:08:26,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:08:26,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:08:26,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:08:26,811 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:08:26,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:08:26,812 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:08:26,812 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:08:26,813 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:08:26,813 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:08:26,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:08:26,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:08:26,814 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:08:26,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:08:26,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:08:26,816 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:08:26,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:08:26,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:08:26,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:08:26,818 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:08:26,818 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:08:26,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:08:26,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 [2022-07-21 05:08:27,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:08:27,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:08:27,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:08:27,082 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:08:27,083 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:08:27,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2022-07-21 05:08:27,147 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea84c587a/39af108069fb4cd0b6d44812de4ec329/FLAG796361368 [2022-07-21 05:08:27,615 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:08:27,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2022-07-21 05:08:27,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea84c587a/39af108069fb4cd0b6d44812de4ec329/FLAG796361368 [2022-07-21 05:08:28,011 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea84c587a/39af108069fb4cd0b6d44812de4ec329 [2022-07-21 05:08:28,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:08:28,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:08:28,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:08:28,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:08:28,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:08:28,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b3ba86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28, skipping insertion in model container [2022-07-21 05:08:28,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:08:28,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:08:28,157 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2022-07-21 05:08:28,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:08:28,168 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:08:28,181 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c[454,467] [2022-07-21 05:08:28,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:08:28,192 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:08:28,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28 WrapperNode [2022-07-21 05:08:28,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:08:28,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:08:28,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:08:28,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:08:28,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,218 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2022-07-21 05:08:28,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:08:28,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:08:28,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:08:28,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:08:28,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:08:28,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:08:28,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:08:28,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:08:28,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (1/1) ... [2022-07-21 05:08:28,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:08:28,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:28,276 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 05:08:28,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 05:08:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:08:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:08:28,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:08:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:08:28,356 INFO L130 BoogieDeclarations]: Found specification of procedure id [2022-07-21 05:08:28,356 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2022-07-21 05:08:28,397 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:08:28,399 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:08:28,506 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:08:28,511 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:08:28,511 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 05:08:28,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:28 BoogieIcfgContainer [2022-07-21 05:08:28,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:08:28,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:08:28,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:08:28,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:08:28,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:08:28" (1/3) ... [2022-07-21 05:08:28,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d69ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:08:28, skipping insertion in model container [2022-07-21 05:08:28,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:08:28" (2/3) ... [2022-07-21 05:08:28,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d69ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:08:28, skipping insertion in model container [2022-07-21 05:08:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:28" (3/3) ... [2022-07-21 05:08:28,521 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2022-07-21 05:08:28,530 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:08:28,531 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:08:28,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:08:28,591 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ce04df0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@374e259e [2022-07-21 05:08:28,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:08:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 05:08:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 05:08:28,601 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:28,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:28,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-07-21 05:08:28,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:28,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600196066] [2022-07-21 05:08:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:28,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:28,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:08:28,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:28,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600196066] [2022-07-21 05:08:28,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600196066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:08:28,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:08:28,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:08:28,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387034509] [2022-07-21 05:08:28,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:08:28,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:08:28,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:08:28,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:08:28,860 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 05:08:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:28,907 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-07-21 05:08:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:08:28,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-07-21 05:08:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:28,917 INFO L225 Difference]: With dead ends: 25 [2022-07-21 05:08:28,918 INFO L226 Difference]: Without dead ends: 15 [2022-07-21 05:08:28,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:08:28,925 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:28,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 35 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:28,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-21 05:08:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-21 05:08:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 05:08:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-07-21 05:08:28,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-07-21 05:08:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:28,951 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-07-21 05:08:28,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 05:08:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-07-21 05:08:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 05:08:28,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:28,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:08:28,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-07-21 05:08:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661685188] [2022-07-21 05:08:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:28,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:29,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661685188] [2022-07-21 05:08:29,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661685188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:29,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739621698] [2022-07-21 05:08:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:29,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:29,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:29,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:08:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:08:29,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:08:29,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 05:08:29,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739621698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:29,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:29,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2022-07-21 05:08:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025102020] [2022-07-21 05:08:29,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:29,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:08:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:08:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:08:29,280 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 05:08:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:29,313 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-21 05:08:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:08:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-07-21 05:08:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:29,315 INFO L225 Difference]: With dead ends: 22 [2022-07-21 05:08:29,315 INFO L226 Difference]: Without dead ends: 18 [2022-07-21 05:08:29,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:08:29,316 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:29,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-21 05:08:29,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-21 05:08:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 05:08:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-21 05:08:29,320 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-21 05:08:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:29,321 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-21 05:08:29,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-21 05:08:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-21 05:08:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 05:08:29,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:29,322 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:29,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:29,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:29,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-07-21 05:08:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269321575] [2022-07-21 05:08:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:08:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269321575] [2022-07-21 05:08:29,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269321575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:29,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80404928] [2022-07-21 05:08:29,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:08:29,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:29,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:29,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:08:29,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:08:29,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 05:08:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 05:08:29,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 05:08:29,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80404928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:29,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:29,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 13 [2022-07-21 05:08:29,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397021809] [2022-07-21 05:08:29,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:29,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 05:08:29,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:29,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 05:08:29,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-21 05:08:29,930 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 05:08:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:29,967 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-21 05:08:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:08:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-07-21 05:08:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:29,968 INFO L225 Difference]: With dead ends: 25 [2022-07-21 05:08:29,968 INFO L226 Difference]: Without dead ends: 21 [2022-07-21 05:08:29,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-07-21 05:08:29,969 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:29,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-21 05:08:29,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-21 05:08:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:08:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-21 05:08:29,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-07-21 05:08:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-21 05:08:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-21 05:08:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-21 05:08:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 05:08:29,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:29,975 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:29,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 05:08:30,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-21 05:08:30,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-07-21 05:08:30,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176664059] [2022-07-21 05:08:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:30,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:30,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:30,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:08:30,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176664059] [2022-07-21 05:08:30,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176664059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:30,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332694625] [2022-07-21 05:08:30,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:08:30,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:30,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:30,299 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:30,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:08:30,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 05:08:30,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 05:08:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:08:30,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:08:30,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332694625] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:30,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:30,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 15 [2022-07-21 05:08:30,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653067795] [2022-07-21 05:08:30,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:30,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 05:08:30,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:30,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 05:08:30,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-07-21 05:08:30,766 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 05:08:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:30,833 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-07-21 05:08:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 05:08:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-07-21 05:08:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:30,834 INFO L225 Difference]: With dead ends: 28 [2022-07-21 05:08:30,834 INFO L226 Difference]: Without dead ends: 24 [2022-07-21 05:08:30,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:08:30,835 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:30,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 47 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-21 05:08:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-21 05:08:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 05:08:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-07-21 05:08:30,838 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-07-21 05:08:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:30,838 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-07-21 05:08:30,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-21 05:08:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-07-21 05:08:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 05:08:30,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:30,839 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:30,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 05:08:31,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:31,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-07-21 05:08:31,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510318137] [2022-07-21 05:08:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:08:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510318137] [2022-07-21 05:08:31,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510318137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644763614] [2022-07-21 05:08:31,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:08:31,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:31,196 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:31,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:08:31,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:08:31,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:31,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 05:08:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:08:31,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 05:08:31,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644763614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:31,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:31,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 17 [2022-07-21 05:08:31,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604893712] [2022-07-21 05:08:31,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:31,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 05:08:31,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 05:08:31,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:08:31,764 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:08:31,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:31,824 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-07-21 05:08:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 05:08:31,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-07-21 05:08:31,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:31,825 INFO L225 Difference]: With dead ends: 31 [2022-07-21 05:08:31,825 INFO L226 Difference]: Without dead ends: 27 [2022-07-21 05:08:31,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2022-07-21 05:08:31,826 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:31,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:31,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-21 05:08:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-21 05:08:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:08:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-07-21 05:08:31,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-07-21 05:08:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:31,831 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-07-21 05:08:31,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-07-21 05:08:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-07-21 05:08:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-21 05:08:31,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:31,832 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:31,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:32,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:32,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:32,052 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-07-21 05:08:32,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:32,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607171349] [2022-07-21 05:08:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:32,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:32,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 05:08:32,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:32,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607171349] [2022-07-21 05:08:32,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607171349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:32,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909950009] [2022-07-21 05:08:32,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:08:32,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:32,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:32,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:32,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:08:32,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 05:08:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:32,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 05:08:32,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-21 05:08:32,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:08:32,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909950009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:32,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:32,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 19 [2022-07-21 05:08:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865120368] [2022-07-21 05:08:32,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:32,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 05:08:32,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 05:08:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-21 05:08:32,942 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-21 05:08:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:33,000 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-07-21 05:08:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:08:33,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-07-21 05:08:33,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:33,001 INFO L225 Difference]: With dead ends: 34 [2022-07-21 05:08:33,001 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 05:08:33,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2022-07-21 05:08:33,002 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:33,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 05:08:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-21 05:08:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 05:08:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-21 05:08:33,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-07-21 05:08:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:33,007 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-21 05:08:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-21 05:08:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-21 05:08:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 05:08:33,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:33,008 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:33,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:33,225 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-07-21 05:08:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:33,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481869862] [2022-07-21 05:08:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-21 05:08:33,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481869862] [2022-07-21 05:08:33,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481869862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:33,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762568911] [2022-07-21 05:08:33,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:08:33,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:33,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:33,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:33,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:08:33,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-21 05:08:33,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 05:08:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-21 05:08:33,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-21 05:08:34,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762568911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:34,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:34,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 21 [2022-07-21 05:08:34,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408782363] [2022-07-21 05:08:34,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:34,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 05:08:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:34,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 05:08:34,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-07-21 05:08:34,440 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-21 05:08:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:34,509 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-07-21 05:08:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:08:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-07-21 05:08:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:34,511 INFO L225 Difference]: With dead ends: 37 [2022-07-21 05:08:34,511 INFO L226 Difference]: Without dead ends: 33 [2022-07-21 05:08:34,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2022-07-21 05:08:34,511 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:34,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-21 05:08:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-21 05:08:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-21 05:08:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-21 05:08:34,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-07-21 05:08:34,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:34,516 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-21 05:08:34,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-21 05:08:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-21 05:08:34,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-21 05:08:34,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:34,517 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:34,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:34,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:34,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:34,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:34,735 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-07-21 05:08:34,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:34,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589268337] [2022-07-21 05:08:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:34,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-21 05:08:34,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:34,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589268337] [2022-07-21 05:08:34,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589268337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:34,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256430175] [2022-07-21 05:08:34,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:08:34,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:34,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:34,856 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:34,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:08:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 05:08:34,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-21 05:08:34,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 05:08:36,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256430175] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:36,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:36,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 23 [2022-07-21 05:08:36,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164538609] [2022-07-21 05:08:36,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:36,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-21 05:08:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:36,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-21 05:08:36,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2022-07-21 05:08:36,309 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-21 05:08:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:36,381 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-07-21 05:08:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 05:08:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-07-21 05:08:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:36,382 INFO L225 Difference]: With dead ends: 40 [2022-07-21 05:08:36,382 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 05:08:36,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2022-07-21 05:08:36,383 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:36,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 05:08:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-07-21 05:08:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 05:08:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-07-21 05:08:36,393 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-07-21 05:08:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:36,394 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-07-21 05:08:36,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-07-21 05:08:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-07-21 05:08:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-21 05:08:36,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:36,397 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:36,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:36,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:36,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:36,617 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-07-21 05:08:36,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:36,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334375089] [2022-07-21 05:08:36,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:36,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 05:08:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334375089] [2022-07-21 05:08:36,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334375089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:36,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717062453] [2022-07-21 05:08:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:08:36,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:36,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:36,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 05:08:36,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:08:36,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:36,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 05:08:36,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-21 05:08:37,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-21 05:08:38,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717062453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:38,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:38,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 25 [2022-07-21 05:08:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844254374] [2022-07-21 05:08:38,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:38,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 05:08:38,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 05:08:38,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-07-21 05:08:38,768 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-21 05:08:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:38,863 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-07-21 05:08:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 05:08:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-07-21 05:08:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:38,867 INFO L225 Difference]: With dead ends: 43 [2022-07-21 05:08:38,868 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 05:08:38,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=365, Invalid=757, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 05:08:38,869 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:38,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 87 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 05:08:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-21 05:08:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-21 05:08:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-07-21 05:08:38,876 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-07-21 05:08:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:38,877 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-07-21 05:08:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-21 05:08:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-07-21 05:08:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 05:08:38,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:38,880 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:38,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 05:08:39,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-07-21 05:08:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:39,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143508454] [2022-07-21 05:08:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:39,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-21 05:08:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:39,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143508454] [2022-07-21 05:08:39,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143508454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:39,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038220870] [2022-07-21 05:08:39,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:08:39,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:39,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:39,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 05:08:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-21 05:08:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-21 05:08:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-21 05:08:39,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 05:08:42,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038220870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:42,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:42,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 27 [2022-07-21 05:08:42,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35776847] [2022-07-21 05:08:42,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 05:08:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 05:08:42,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2022-07-21 05:08:42,094 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-21 05:08:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:42,208 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-07-21 05:08:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:08:42,209 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-07-21 05:08:42,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:42,210 INFO L225 Difference]: With dead ends: 46 [2022-07-21 05:08:42,210 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 05:08:42,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=434, Invalid=898, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 05:08:42,211 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:42,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 84 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:08:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 05:08:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-21 05:08:42,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-07-21 05:08:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-07-21 05:08:42,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-07-21 05:08:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:42,216 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-07-21 05:08:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.08) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-07-21 05:08:42,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-07-21 05:08:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 05:08:42,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:42,220 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:42,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-21 05:08:42,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 05:08:42,439 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-07-21 05:08:42,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:42,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001616065] [2022-07-21 05:08:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:42,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 05:08:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001616065] [2022-07-21 05:08:42,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001616065] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135831859] [2022-07-21 05:08:42,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:08:42,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:42,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:42,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 05:08:42,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:08:42,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:42,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 05:08:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-21 05:08:42,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-21 05:08:46,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135831859] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:46,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:46,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 29 [2022-07-21 05:08:46,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031734208] [2022-07-21 05:08:46,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:46,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 05:08:46,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 05:08:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2022-07-21 05:08:46,141 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-21 05:08:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:46,266 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-21 05:08:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:08:46,267 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-07-21 05:08:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:46,267 INFO L225 Difference]: With dead ends: 49 [2022-07-21 05:08:46,267 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 05:08:46,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 05:08:46,269 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:46,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 97 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:08:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 05:08:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 05:08:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-07-21 05:08:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-21 05:08:46,279 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-07-21 05:08:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:46,280 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-21 05:08:46,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.074074074074074) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-07-21 05:08:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-21 05:08:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-21 05:08:46,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:46,281 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:46,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:46,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 05:08:46,498 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:46,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-07-21 05:08:46,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:46,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652459724] [2022-07-21 05:08:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:46,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-21 05:08:46,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652459724] [2022-07-21 05:08:46,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652459724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:46,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102929602] [2022-07-21 05:08:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:08:46,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:46,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:46,781 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:46,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 05:08:47,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-21 05:08:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 05:08:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:47,117 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-21 05:08:47,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 05:08:50,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102929602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:50,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:50,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 31 [2022-07-21 05:08:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020662743] [2022-07-21 05:08:50,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-21 05:08:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-21 05:08:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2022-07-21 05:08:50,216 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-21 05:08:50,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:50,360 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-07-21 05:08:50,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 05:08:50,360 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2022-07-21 05:08:50,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:50,361 INFO L225 Difference]: With dead ends: 52 [2022-07-21 05:08:50,361 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 05:08:50,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=590, Invalid=1216, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 05:08:50,362 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 213 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:50,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 115 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:08:50,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 05:08:50,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 05:08:50,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-07-21 05:08:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-07-21 05:08:50,365 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-07-21 05:08:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:50,365 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-07-21 05:08:50,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-07-21 05:08:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-07-21 05:08:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-21 05:08:50,366 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:50,366 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:50,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:50,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 05:08:50,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:50,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-07-21 05:08:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:50,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677430715] [2022-07-21 05:08:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-21 05:08:50,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677430715] [2022-07-21 05:08:50,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677430715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:50,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855880303] [2022-07-21 05:08:50,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:08:50,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:50,831 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 05:08:51,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-21 05:08:51,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:08:51,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-21 05:08:51,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-07-21 05:08:51,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:08:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-21 05:08:56,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855880303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:08:56,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:08:56,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 33 [2022-07-21 05:08:56,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721343450] [2022-07-21 05:08:56,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:08:56,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-21 05:08:56,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:08:56,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-21 05:08:56,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2022-07-21 05:08:56,374 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-21 05:08:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:08:56,497 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-07-21 05:08:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-21 05:08:56,498 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2022-07-21 05:08:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:08:56,498 INFO L225 Difference]: With dead ends: 55 [2022-07-21 05:08:56,498 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 05:08:56,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 05:08:56,500 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:08:56,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 119 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:08:56,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 05:08:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 05:08:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-07-21 05:08:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-07-21 05:08:56,503 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-07-21 05:08:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:08:56,503 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-07-21 05:08:56,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-07-21 05:08:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-07-21 05:08:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-21 05:08:56,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:08:56,504 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:08:56,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 05:08:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-21 05:08:56,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:08:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:08:56,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-07-21 05:08:56,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:08:56,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840529927] [2022-07-21 05:08:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:08:56,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:08:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:08:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-21 05:08:56,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:08:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840529927] [2022-07-21 05:08:56,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840529927] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:08:56,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498992814] [2022-07-21 05:08:56,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:08:56,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:08:56,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:08:56,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:08:56,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 05:08:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:08:57,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-21 05:08:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:08:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-21 05:08:57,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 05:09:02,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498992814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:02,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:02,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 35 [2022-07-21 05:09:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931560865] [2022-07-21 05:09:02,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:02,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 05:09:02,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:02,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 05:09:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=869, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 05:09:02,160 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-21 05:09:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:02,264 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-07-21 05:09:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 05:09:02,265 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2022-07-21 05:09:02,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:02,266 INFO L225 Difference]: With dead ends: 58 [2022-07-21 05:09:02,266 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 05:09:02,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=770, Invalid=1582, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 05:09:02,268 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:02,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 133 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:09:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 05:09:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-21 05:09:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-21 05:09:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-21 05:09:02,283 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-07-21 05:09:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:02,290 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-21 05:09:02,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-07-21 05:09:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-21 05:09:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 05:09:02,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:02,297 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:02,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 05:09:02,519 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-07-21 05:09:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425403388] [2022-07-21 05:09:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-21 05:09:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425403388] [2022-07-21 05:09:02,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425403388] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959335039] [2022-07-21 05:09:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:09:02,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:02,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:02,803 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:02,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 05:09:03,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:09:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:09:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 05:09:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-21 05:09:03,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-07-21 05:09:08,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959335039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:08,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:08,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 37 [2022-07-21 05:09:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591476058] [2022-07-21 05:09:08,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:08,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 05:09:08,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 05:09:08,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=974, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 05:09:08,947 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-07-21 05:09:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:09,085 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-07-21 05:09:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-21 05:09:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2022-07-21 05:09:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:09,087 INFO L225 Difference]: With dead ends: 61 [2022-07-21 05:09:09,087 INFO L226 Difference]: Without dead ends: 57 [2022-07-21 05:09:09,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=869, Invalid=1783, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 05:09:09,094 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:09,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 131 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:09:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-21 05:09:09,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-21 05:09:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-21 05:09:09,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-21 05:09:09,111 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-07-21 05:09:09,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:09,112 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-21 05:09:09,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 2.057142857142857) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-07-21 05:09:09,112 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-21 05:09:09,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-21 05:09:09,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:09,114 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:09,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:09,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:09,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-07-21 05:09:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:09,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128974826] [2022-07-21 05:09:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-21 05:09:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128974826] [2022-07-21 05:09:09,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128974826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191443438] [2022-07-21 05:09:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:09:09,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:09,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:09,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 05:09:10,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-21 05:09:10,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:09:10,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-21 05:09:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-21 05:09:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-21 05:09:17,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191443438] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:17,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:17,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 39 [2022-07-21 05:09:17,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289079354] [2022-07-21 05:09:17,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:17,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-21 05:09:17,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:17,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-21 05:09:17,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1085, Unknown=0, NotChecked=0, Total=1482 [2022-07-21 05:09:17,335 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-07-21 05:09:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:17,530 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-07-21 05:09:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-21 05:09:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2022-07-21 05:09:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:17,531 INFO L225 Difference]: With dead ends: 64 [2022-07-21 05:09:17,531 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 05:09:17,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=974, Invalid=1996, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 05:09:17,532 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 406 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:17,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 137 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:09:17,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 05:09:17,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 05:09:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-21 05:09:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-07-21 05:09:17,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2022-07-21 05:09:17,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:17,535 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-07-21 05:09:17,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.054054054054054) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-07-21 05:09:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-07-21 05:09:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-21 05:09:17,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:17,536 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:17,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:17,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 05:09:17,738 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2022-07-21 05:09:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:17,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507750074] [2022-07-21 05:09:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:17,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:17,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:18,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-07-21 05:09:18,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:18,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507750074] [2022-07-21 05:09:18,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507750074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500444357] [2022-07-21 05:09:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 05:09:18,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:18,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:18,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:18,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 05:09:18,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 05:09:18,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:09:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-21 05:09:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-07-21 05:09:19,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-21 05:09:27,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500444357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:27,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:27,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 41 [2022-07-21 05:09:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445655138] [2022-07-21 05:09:27,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:27,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 05:09:27,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 05:09:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 05:09:27,511 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-07-21 05:09:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:27,694 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-07-21 05:09:27,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-21 05:09:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2022-07-21 05:09:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:27,695 INFO L225 Difference]: With dead ends: 67 [2022-07-21 05:09:27,695 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 05:09:27,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1085, Invalid=2221, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 05:09:27,697 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:27,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 135 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:09:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 05:09:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-21 05:09:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-07-21 05:09:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-07-21 05:09:27,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2022-07-21 05:09:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:27,700 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-07-21 05:09:27,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.051282051282051) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-07-21 05:09:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-07-21 05:09:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 05:09:27,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:27,701 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:27,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:27,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 05:09:27,924 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2022-07-21 05:09:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306584722] [2022-07-21 05:09:27,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:27,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:27,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-21 05:09:28,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306584722] [2022-07-21 05:09:28,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306584722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267038084] [2022-07-21 05:09:28,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 05:09:28,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:28,290 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:28,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 05:09:29,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-21 05:09:29,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:09:29,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-21 05:09:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-07-21 05:09:29,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-21 05:09:41,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267038084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:41,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:41,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 43 [2022-07-21 05:09:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622325466] [2022-07-21 05:09:41,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 05:09:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 05:09:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1325, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 05:09:41,362 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-07-21 05:09:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:41,482 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-07-21 05:09:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 05:09:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2022-07-21 05:09:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:41,485 INFO L225 Difference]: With dead ends: 70 [2022-07-21 05:09:41,485 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 05:09:41,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1202, Invalid=2458, Unknown=0, NotChecked=0, Total=3660 [2022-07-21 05:09:41,486 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:41,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 160 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:09:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 05:09:41,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-21 05:09:41,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-21 05:09:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-07-21 05:09:41,489 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2022-07-21 05:09:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:41,489 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-07-21 05:09:41,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.048780487804878) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-07-21 05:09:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-07-21 05:09:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 05:09:41,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:41,490 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:41,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:41,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 05:09:41,691 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:41,691 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2022-07-21 05:09:41,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:41,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067566174] [2022-07-21 05:09:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:41,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:42,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-21 05:09:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067566174] [2022-07-21 05:09:42,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067566174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:42,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225601050] [2022-07-21 05:09:42,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 05:09:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:42,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:42,184 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:42,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 05:09:43,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-21 05:09:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:09:43,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 05:09:43,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-07-21 05:09:43,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:09:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-21 05:09:55,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225601050] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:09:55,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:09:55,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 45 [2022-07-21 05:09:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125166762] [2022-07-21 05:09:55,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:09:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 05:09:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:09:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 05:09:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1454, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:09:55,740 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2022-07-21 05:09:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:09:55,892 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-07-21 05:09:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-21 05:09:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 118 [2022-07-21 05:09:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:09:55,893 INFO L225 Difference]: With dead ends: 73 [2022-07-21 05:09:55,894 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 05:09:55,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1325, Invalid=2707, Unknown=0, NotChecked=0, Total=4032 [2022-07-21 05:09:55,896 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:09:55,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 168 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:09:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 05:09:55,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-21 05:09:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2022-07-21 05:09:55,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-21 05:09:55,898 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2022-07-21 05:09:55,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:09:55,899 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-21 05:09:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.046511627906977) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2022-07-21 05:09:55,899 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-21 05:09:55,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-21 05:09:55,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:09:55,900 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:09:55,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 05:09:56,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:56,109 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:09:56,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:09:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2022-07-21 05:09:56,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:09:56,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323908846] [2022-07-21 05:09:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:09:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:09:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:09:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-21 05:09:56,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:09:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323908846] [2022-07-21 05:09:56,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323908846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:09:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900396333] [2022-07-21 05:09:56,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 05:09:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:09:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:09:56,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:09:56,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 05:09:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:09:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-21 05:09:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:09:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-07-21 05:09:58,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:10:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-21 05:10:13,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900396333] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:10:13,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:10:13,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2022-07-21 05:10:13,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494015754] [2022-07-21 05:10:13,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:10:13,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 05:10:13,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 05:10:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1500, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 05:10:13,647 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2022-07-21 05:10:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:13,968 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-07-21 05:10:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 05:10:13,968 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) Word has length 124 [2022-07-21 05:10:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:13,969 INFO L225 Difference]: With dead ends: 76 [2022-07-21 05:10:13,969 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 05:10:13,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 263 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1451, Invalid=2839, Unknown=0, NotChecked=0, Total=4290 [2022-07-21 05:10:13,971 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 870 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:13,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 161 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:10:13,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 05:10:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-21 05:10:13,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-21 05:10:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-07-21 05:10:13,974 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2022-07-21 05:10:13,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:13,974 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-07-21 05:10:13,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.022222222222222) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2022-07-21 05:10:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-07-21 05:10:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-21 05:10:13,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:13,975 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:14,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 05:10:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:14,184 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2022-07-21 05:10:14,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:14,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575166293] [2022-07-21 05:10:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:14,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-21 05:10:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575166293] [2022-07-21 05:10:15,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575166293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:10:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598798609] [2022-07-21 05:10:15,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 05:10:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:10:15,444 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:10:15,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 05:10:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 05:10:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:10:17,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-21 05:10:17,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:10:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-21 05:10:17,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:10:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-07-21 05:10:18,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598798609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:10:18,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:10:18,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2022-07-21 05:10:18,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699346571] [2022-07-21 05:10:18,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:10:18,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-21 05:10:18,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:18,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-21 05:10:18,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:10:18,984 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2022-07-21 05:10:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:19,574 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-07-21 05:10:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-21 05:10:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 130 [2022-07-21 05:10:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:19,576 INFO L225 Difference]: With dead ends: 79 [2022-07-21 05:10:19,576 INFO L226 Difference]: Without dead ends: 75 [2022-07-21 05:10:19,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 297 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-07-21 05:10:19,577 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:19,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1361 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 05:10:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-21 05:10:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-07-21 05:10:19,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-07-21 05:10:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-07-21 05:10:19,579 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2022-07-21 05:10:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:19,580 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-07-21 05:10:19,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2022-07-21 05:10:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-07-21 05:10:19,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-21 05:10:19,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:10:19,580 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:10:19,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-21 05:10:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-21 05:10:19,787 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:10:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:10:19,788 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2022-07-21 05:10:19,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:10:19,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863098806] [2022-07-21 05:10:19,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:10:19,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:10:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:19,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:19,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:19,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 05:10:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:10:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-21 05:10:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:10:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863098806] [2022-07-21 05:10:20,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863098806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:10:20,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524016240] [2022-07-21 05:10:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 05:10:20,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:10:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:10:20,348 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:10:20,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 05:10:22,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-21 05:10:22,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 05:10:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 05:10:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:10:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-21 05:10:22,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:10:22,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524016240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:10:22,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:10:22,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 28 [2022-07-21 05:10:22,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738023101] [2022-07-21 05:10:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:10:22,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 05:10:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:10:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 05:10:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2022-07-21 05:10:22,663 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-21 05:10:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:10:22,990 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-07-21 05:10:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 05:10:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 136 [2022-07-21 05:10:22,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:10:22,992 INFO L225 Difference]: With dead ends: 75 [2022-07-21 05:10:22,992 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 05:10:22,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2022-07-21 05:10:22,993 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:10:22,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 233 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:10:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 05:10:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 05:10:22,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:10:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 05:10:22,994 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2022-07-21 05:10:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:10:22,995 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 05:10:22,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2022-07-21 05:10:22,995 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 05:10:22,995 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 05:10:22,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 05:10:23,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-21 05:10:23,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-21 05:10:23,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-07-21 05:10:23,224 INFO L899 garLoopResultBuilder]: For program point L14(lines 14 16) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L895 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (<= 20 |ULTIMATE.start_main_~input~0#1|) (<= |ULTIMATE.start_main_~input~0#1| 20)) [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 17) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L895 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2022-07-21 05:10:23,225 INFO L902 garLoopResultBuilder]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-07-21 05:10:23,225 INFO L899 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2022-07-21 05:10:23,228 INFO L356 BasicCegarLoop]: Path program histogram: [21, 1] [2022-07-21 05:10:23,229 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 05:10:23,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:10:23 BoogieIcfgContainer [2022-07-21 05:10:23,235 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 05:10:23,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 05:10:23,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 05:10:23,235 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 05:10:23,236 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:08:28" (3/4) ... [2022-07-21 05:10:23,237 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 05:10:23,243 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2022-07-21 05:10:23,246 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-07-21 05:10:23,247 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-21 05:10:23,247 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 05:10:23,247 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 05:10:23,267 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 05:10:23,267 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 05:10:23,268 INFO L158 Benchmark]: Toolchain (without parser) took 115253.16ms. Allocated memory was 60.8MB in the beginning and 824.2MB in the end (delta: 763.4MB). Free memory was 40.2MB in the beginning and 660.5MB in the end (delta: -620.2MB). Peak memory consumption was 141.5MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,271 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory was 43.5MB in the beginning and 43.4MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 05:10:23,271 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.19ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 30.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,272 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.71ms. Allocated memory is still 60.8MB. Free memory was 30.7MB in the beginning and 45.1MB in the end (delta: -14.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,272 INFO L158 Benchmark]: Boogie Preprocessor took 31.25ms. Allocated memory is still 60.8MB. Free memory was 45.1MB in the beginning and 44.2MB in the end (delta: 833.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,272 INFO L158 Benchmark]: RCFGBuilder took 261.75ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 36.0MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,272 INFO L158 Benchmark]: TraceAbstraction took 114719.87ms. Allocated memory was 60.8MB in the beginning and 824.2MB in the end (delta: 763.4MB). Free memory was 35.5MB in the beginning and 662.6MB in the end (delta: -627.1MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,274 INFO L158 Benchmark]: Witness Printer took 32.13ms. Allocated memory is still 824.2MB. Free memory was 662.6MB in the beginning and 660.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 05:10:23,275 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 60.8MB. Free memory was 43.5MB in the beginning and 43.4MB in the end (delta: 46.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.19ms. Allocated memory is still 60.8MB. Free memory was 40.1MB in the beginning and 30.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.71ms. Allocated memory is still 60.8MB. Free memory was 30.7MB in the beginning and 45.1MB in the end (delta: -14.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.25ms. Allocated memory is still 60.8MB. Free memory was 45.1MB in the beginning and 44.2MB in the end (delta: 833.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 261.75ms. Allocated memory is still 60.8MB. Free memory was 44.2MB in the beginning and 36.0MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 114719.87ms. Allocated memory was 60.8MB in the beginning and 824.2MB in the end (delta: 763.4MB). Free memory was 35.5MB in the beginning and 662.6MB in the end (delta: -627.1MB). Peak memory consumption was 136.5MB. Max. memory is 16.1GB. * Witness Printer took 32.13ms. Allocated memory is still 824.2MB. Free memory was 662.6MB in the beginning and 660.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 114.7s, OverallIterations: 22, TraceHistogramMax: 22, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2940 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2689 mSDsluCounter, 3562 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3259 mSDsCounter, 1138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3209 IncrementalHoareTripleChecker+Invalid, 4347 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1138 mSolverCounterUnsat, 303 mSDtfsCounter, 3209 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4093 GetRequests, 3270 SyntacticMatches, 7 SemanticMatches, 816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9045 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=21, InterpolantAutomatonStates: 361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 93.6s InterpolantComputationTime, 3202 NumberOfCodeBlocks, 3202 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 4599 ConstructedInterpolants, 0 QuantifiedInterpolants, 13930 SizeOfPredicates, 232 NumberOfNonLiveVariables, 4200 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 13406/29148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-21 05:10:23,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE