./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/eca-rers2012/Problem13_label42.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 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:22:47,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:22:47,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:22:47,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:22:47,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:22:47,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:22:47,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:22:47,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:22:47,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:22:47,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:22:47,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:22:47,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:22:47,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:22:47,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:22:47,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:22:47,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:22:47,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:22:47,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:22:47,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:22:47,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:22:47,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:22:47,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:22:47,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:22:47,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:22:47,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:22:47,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:22:47,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:22:47,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:22:47,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:22:47,128 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:22:47,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:22:47,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:22:47,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:22:47,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:22:47,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:22:47,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:22:47,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:22:47,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:22:47,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:22:47,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:22:47,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:22:47,134 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:22:47,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:22:47,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:22:47,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:22:47,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:22:47,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:22:47,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:22:47,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:22:47,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:22:47,164 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:22:47,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:22:47,165 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:22:47,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:22:47,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:22:47,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:22:47,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:22:47,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:22:47,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:22:47,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:22:47,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:22:47,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:22:47,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:22:47,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:22:47,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:22:47,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:22:47,169 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:22:47,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:22:47,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:22:47,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:22:47,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e [2021-12-22 09:22:47,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:22:47,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:22:47,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:22:47,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:22:47,366 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:22:47,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-22 09:22:47,404 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73dbd089b/3742d23faa94460bb5a26530e52111a2/FLAGb5be4df89 [2021-12-22 09:22:47,971 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:22:47,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-22 09:22:48,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73dbd089b/3742d23faa94460bb5a26530e52111a2/FLAGb5be4df89 [2021-12-22 09:22:48,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73dbd089b/3742d23faa94460bb5a26530e52111a2 [2021-12-22 09:22:48,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:22:48,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:22:48,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:22:48,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:22:48,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:22:48,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:22:48" (1/1) ... [2021-12-22 09:22:48,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f98dfcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:48, skipping insertion in model container [2021-12-22 09:22:48,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:22:48" (1/1) ... [2021-12-22 09:22:48,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:22:48,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:22:48,759 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/eca-rers2012/Problem13_label42.c[9228,9241] [2021-12-22 09:22:49,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:22:49,313 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:22:49,355 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/eca-rers2012/Problem13_label42.c[9228,9241] [2021-12-22 09:22:49,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:22:49,719 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:22:49,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49 WrapperNode [2021-12-22 09:22:49,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:22:49,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:22:49,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:22:49,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:22:49,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:49,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,199 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-22 09:22:50,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:22:50,201 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:22:50,201 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:22:50,201 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:22:50,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:22:50,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:22:50,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:22:50,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:22:50,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (1/1) ... [2021-12-22 09:22:50,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:22:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:22:50,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:22:50,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:22:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:22:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:22:50,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:22:50,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:22:50,864 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:22:50,865 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:22:54,125 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:22:54,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:22:54,140 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:22:54,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:22:54 BoogieIcfgContainer [2021-12-22 09:22:54,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:22:54,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:22:54,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:22:54,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:22:54,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:22:48" (1/3) ... [2021-12-22 09:22:54,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69470b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:22:54, skipping insertion in model container [2021-12-22 09:22:54,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:22:49" (2/3) ... [2021-12-22 09:22:54,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69470b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:22:54, skipping insertion in model container [2021-12-22 09:22:54,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:22:54" (3/3) ... [2021-12-22 09:22:54,163 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label42.c [2021-12-22 09:22:54,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:22:54,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:22:54,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:22:54,243 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:22:54,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:22:54,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2021-12-22 09:22:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 09:22:54,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:22:54,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:22:54,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:22:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:22:54,279 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-22 09:22:54,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:22:54,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003319731] [2021-12-22 09:22:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:22:54,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:22:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:22:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:22:54,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:22:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003319731] [2021-12-22 09:22:54,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003319731] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:22:54,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:22:54,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:22:54,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69806667] [2021-12-22 09:22:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:22:54,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:22:54,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:22:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:22:54,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:22:54,473 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2021-12-22 09:22:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:22:58,015 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-22 09:22:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:22:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-22 09:22:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:22:58,043 INFO L225 Difference]: With dead ends: 3121 [2021-12-22 09:22:58,043 INFO L226 Difference]: Without dead ends: 1944 [2021-12-22 09:22:58,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:22:58,059 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:22:58,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-22 09:22:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-22 09:22:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-22 09:22:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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) [2021-12-22 09:22:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-22 09:22:58,181 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 65 [2021-12-22 09:22:58,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:22:58,186 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-22 09:22:58,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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) [2021-12-22 09:22:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-22 09:22:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 09:22:58,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:22:58,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:22:58,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:22:58,194 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:22:58,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:22:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash -746498798, now seen corresponding path program 1 times [2021-12-22 09:22:58,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:22:58,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146037280] [2021-12-22 09:22:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:22:58,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:22:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:22:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:22:58,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:22:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146037280] [2021-12-22 09:22:58,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146037280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:22:58,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:22:58,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:22:58,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125053012] [2021-12-22 09:22:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:22:58,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:22:58,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:22:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:22:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:22:58,349 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:01,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:01,141 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2021-12-22 09:23:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-12-22 09:23:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:01,153 INFO L225 Difference]: With dead ends: 5351 [2021-12-22 09:23:01,154 INFO L226 Difference]: Without dead ends: 3480 [2021-12-22 09:23:01,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:01,159 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:01,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:23:01,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-12-22 09:23:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2021-12-22 09:23:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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) [2021-12-22 09:23:01,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2021-12-22 09:23:01,213 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 130 [2021-12-22 09:23:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:01,215 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2021-12-22 09:23:01,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 2 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2021-12-22 09:23:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-22 09:23:01,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:01,219 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:01,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:23:01,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1004753335, now seen corresponding path program 1 times [2021-12-22 09:23:01,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:01,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230362360] [2021-12-22 09:23:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:01,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:01,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:01,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230362360] [2021-12-22 09:23:01,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230362360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:01,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:01,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:01,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549246660] [2021-12-22 09:23:01,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:01,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:01,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:01,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:01,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:01,324 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2021-12-22 09:23:04,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:04,260 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2021-12-22 09:23:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:04,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-22 09:23:04,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:04,277 INFO L225 Difference]: With dead ends: 10144 [2021-12-22 09:23:04,277 INFO L226 Difference]: Without dead ends: 6667 [2021-12-22 09:23:04,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:04,283 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:04,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 09:23:04,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-12-22 09:23:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2021-12-22 09:23:04,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 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) [2021-12-22 09:23:04,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2021-12-22 09:23:04,367 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 132 [2021-12-22 09:23:04,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:04,369 INFO L470 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2021-12-22 09:23:04,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 2 states have internal predecessors, (132), 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) [2021-12-22 09:23:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2021-12-22 09:23:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-22 09:23:04,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:04,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:04,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:23:04,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -894756506, now seen corresponding path program 1 times [2021-12-22 09:23:04,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:04,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560443329] [2021-12-22 09:23:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:04,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:04,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:04,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560443329] [2021-12-22 09:23:04,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560443329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:04,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:04,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:04,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889863609] [2021-12-22 09:23:04,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:04,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:04,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:04,465 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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) [2021-12-22 09:23:07,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:07,236 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2021-12-22 09:23:07,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:07,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-22 09:23:07,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:07,271 INFO L225 Difference]: With dead ends: 19637 [2021-12-22 09:23:07,272 INFO L226 Difference]: Without dead ends: 12982 [2021-12-22 09:23:07,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:07,287 INFO L933 BasicCegarLoop]: 1012 mSDtfsCounter, 792 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:07,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 1162 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 09:23:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2021-12-22 09:23:07,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12964. [2021-12-22 09:23:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2390650312427678) internal successors, (16062), 12963 states have internal predecessors, (16062), 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) [2021-12-22 09:23:07,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16062 transitions. [2021-12-22 09:23:07,494 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16062 transitions. Word has length 138 [2021-12-22 09:23:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:07,495 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16062 transitions. [2021-12-22 09:23:07,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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) [2021-12-22 09:23:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16062 transitions. [2021-12-22 09:23:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-22 09:23:07,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:07,498 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:07,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:23:07,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1196327346, now seen corresponding path program 1 times [2021-12-22 09:23:07,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:07,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193740564] [2021-12-22 09:23:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:07,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:07,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:07,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193740564] [2021-12-22 09:23:07,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193740564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:07,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:07,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:07,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128107828] [2021-12-22 09:23:07,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:07,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:07,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:07,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:07,615 INFO L87 Difference]: Start difference. First operand 12964 states and 16062 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-12-22 09:23:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:10,119 INFO L93 Difference]: Finished difference Result 26713 states and 32924 transitions. [2021-12-22 09:23:10,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:10,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-12-22 09:23:10,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:10,142 INFO L225 Difference]: With dead ends: 26713 [2021-12-22 09:23:10,142 INFO L226 Difference]: Without dead ends: 13751 [2021-12-22 09:23:10,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:10,155 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:23:10,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13751 states. [2021-12-22 09:23:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13751 to 13751. [2021-12-22 09:23:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13751 states, 13750 states have (on average 1.2257454545454545) internal successors, (16854), 13750 states have internal predecessors, (16854), 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) [2021-12-22 09:23:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13751 states to 13751 states and 16854 transitions. [2021-12-22 09:23:10,307 INFO L78 Accepts]: Start accepts. Automaton has 13751 states and 16854 transitions. Word has length 154 [2021-12-22 09:23:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:10,307 INFO L470 AbstractCegarLoop]: Abstraction has 13751 states and 16854 transitions. [2021-12-22 09:23:10,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 2 states have internal predecessors, (154), 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) [2021-12-22 09:23:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 13751 states and 16854 transitions. [2021-12-22 09:23:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-22 09:23:10,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:10,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:10,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:23:10,309 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash -62914249, now seen corresponding path program 1 times [2021-12-22 09:23:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:10,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276777149] [2021-12-22 09:23:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:10,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:10,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:10,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276777149] [2021-12-22 09:23:10,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276777149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:10,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:10,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:10,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310877953] [2021-12-22 09:23:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:10,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:10,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:10,390 INFO L87 Difference]: Start difference. First operand 13751 states and 16854 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2021-12-22 09:23:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:12,954 INFO L93 Difference]: Finished difference Result 26728 states and 32944 transitions. [2021-12-22 09:23:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-22 09:23:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:12,975 INFO L225 Difference]: With dead ends: 26728 [2021-12-22 09:23:12,976 INFO L226 Difference]: Without dead ends: 13766 [2021-12-22 09:23:12,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:12,986 INFO L933 BasicCegarLoop]: 1256 mSDtfsCounter, 1059 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 3108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:12,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1059 Valid, 1309 Invalid, 3108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 09:23:12,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13766 states. [2021-12-22 09:23:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13766 to 13748. [2021-12-22 09:23:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13748 states, 13747 states have (on average 1.203753546228268) internal successors, (16548), 13747 states have internal predecessors, (16548), 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) [2021-12-22 09:23:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 16548 transitions. [2021-12-22 09:23:13,125 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 16548 transitions. Word has length 161 [2021-12-22 09:23:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:13,125 INFO L470 AbstractCegarLoop]: Abstraction has 13748 states and 16548 transitions. [2021-12-22 09:23:13,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 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) [2021-12-22 09:23:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 16548 transitions. [2021-12-22 09:23:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-22 09:23:13,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:13,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:23:13,128 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:13,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2120074091, now seen corresponding path program 1 times [2021-12-22 09:23:13,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:13,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037207345] [2021-12-22 09:23:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:13,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:13,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037207345] [2021-12-22 09:23:13,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037207345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:13,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:13,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:13,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179735863] [2021-12-22 09:23:13,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:13,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:13,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:13,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:13,196 INFO L87 Difference]: Start difference. First operand 13748 states and 16548 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-12-22 09:23:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:16,034 INFO L93 Difference]: Finished difference Result 33020 states and 40677 transitions. [2021-12-22 09:23:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-12-22 09:23:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:16,069 INFO L225 Difference]: With dead ends: 33020 [2021-12-22 09:23:16,069 INFO L226 Difference]: Without dead ends: 20061 [2021-12-22 09:23:16,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:16,082 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 881 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:16,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 945 Invalid, 3244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:23:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20061 states. [2021-12-22 09:23:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20061 to 20051. [2021-12-22 09:23:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20051 states, 20050 states have (on average 1.1791022443890273) internal successors, (23641), 20050 states have internal predecessors, (23641), 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) [2021-12-22 09:23:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20051 states to 20051 states and 23641 transitions. [2021-12-22 09:23:16,293 INFO L78 Accepts]: Start accepts. Automaton has 20051 states and 23641 transitions. Word has length 243 [2021-12-22 09:23:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:16,294 INFO L470 AbstractCegarLoop]: Abstraction has 20051 states and 23641 transitions. [2021-12-22 09:23:16,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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) [2021-12-22 09:23:16,294 INFO L276 IsEmpty]: Start isEmpty. Operand 20051 states and 23641 transitions. [2021-12-22 09:23:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-12-22 09:23:16,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:16,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:16,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:23:16,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:16,300 INFO L85 PathProgramCache]: Analyzing trace with hash -71323228, now seen corresponding path program 1 times [2021-12-22 09:23:16,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:16,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499958970] [2021-12-22 09:23:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:16,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-22 09:23:16,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:16,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499958970] [2021-12-22 09:23:16,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499958970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:16,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:16,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:16,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363881849] [2021-12-22 09:23:16,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:16,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:16,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:16,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:16,460 INFO L87 Difference]: Start difference. First operand 20051 states and 23641 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-12-22 09:23:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:19,367 INFO L93 Difference]: Finished difference Result 45632 states and 54873 transitions. [2021-12-22 09:23:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:19,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 332 [2021-12-22 09:23:19,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:19,406 INFO L225 Difference]: With dead ends: 45632 [2021-12-22 09:23:19,407 INFO L226 Difference]: Without dead ends: 26370 [2021-12-22 09:23:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:19,425 INFO L933 BasicCegarLoop]: 699 mSDtfsCounter, 968 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:19,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 787 Invalid, 3346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:23:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26370 states. [2021-12-22 09:23:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26370 to 26358. [2021-12-22 09:23:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26358 states, 26357 states have (on average 1.1839738968774898) internal successors, (31206), 26357 states have internal predecessors, (31206), 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) [2021-12-22 09:23:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26358 states to 26358 states and 31206 transitions. [2021-12-22 09:23:19,689 INFO L78 Accepts]: Start accepts. Automaton has 26358 states and 31206 transitions. Word has length 332 [2021-12-22 09:23:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:19,690 INFO L470 AbstractCegarLoop]: Abstraction has 26358 states and 31206 transitions. [2021-12-22 09:23:19,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2021-12-22 09:23:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 26358 states and 31206 transitions. [2021-12-22 09:23:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-12-22 09:23:19,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:19,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:19,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:23:19,698 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:19,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1335303458, now seen corresponding path program 1 times [2021-12-22 09:23:19,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:19,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528769157] [2021-12-22 09:23:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 327 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-12-22 09:23:19,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:19,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528769157] [2021-12-22 09:23:19,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528769157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:19,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:19,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:19,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769697339] [2021-12-22 09:23:19,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:19,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:19,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:19,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:19,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:19,829 INFO L87 Difference]: Start difference. First operand 26358 states and 31206 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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) [2021-12-22 09:23:22,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:22,756 INFO L93 Difference]: Finished difference Result 61391 states and 72386 transitions. [2021-12-22 09:23:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:22,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 384 [2021-12-22 09:23:22,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:22,797 INFO L225 Difference]: With dead ends: 61391 [2021-12-22 09:23:22,797 INFO L226 Difference]: Without dead ends: 35822 [2021-12-22 09:23:22,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:22,814 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 728 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 2909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:22,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 1226 Invalid, 2909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:23:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35822 states. [2021-12-22 09:23:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35822 to 35812. [2021-12-22 09:23:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35812 states, 35811 states have (on average 1.1522716483761972) internal successors, (41264), 35811 states have internal predecessors, (41264), 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) [2021-12-22 09:23:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35812 states to 35812 states and 41264 transitions. [2021-12-22 09:23:23,150 INFO L78 Accepts]: Start accepts. Automaton has 35812 states and 41264 transitions. Word has length 384 [2021-12-22 09:23:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:23,151 INFO L470 AbstractCegarLoop]: Abstraction has 35812 states and 41264 transitions. [2021-12-22 09:23:23,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 2 states have internal predecessors, (228), 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) [2021-12-22 09:23:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 35812 states and 41264 transitions. [2021-12-22 09:23:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-22 09:23:23,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:23,158 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:23,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:23:23,158 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash -607606650, now seen corresponding path program 1 times [2021-12-22 09:23:23,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:23,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44236024] [2021-12-22 09:23:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:23,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 251 proven. 75 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-22 09:23:23,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44236024] [2021-12-22 09:23:23,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44236024] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:23:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356598543] [2021-12-22 09:23:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:23,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:23:23,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:23:23,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:23:23,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:23:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:23:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:23:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2021-12-22 09:23:24,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:23:24,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356598543] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:24,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:23:24,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-22 09:23:24,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019829964] [2021-12-22 09:23:24,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:24,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:24,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:23:24,093 INFO L87 Difference]: Start difference. First operand 35812 states and 41264 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2021-12-22 09:23:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:27,353 INFO L93 Difference]: Finished difference Result 101690 states and 117796 transitions. [2021-12-22 09:23:27,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:27,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2021-12-22 09:23:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:27,430 INFO L225 Difference]: With dead ends: 101690 [2021-12-22 09:23:27,430 INFO L226 Difference]: Without dead ends: 66667 [2021-12-22 09:23:27,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:23:27,458 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1043 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1043 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:27,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1043 Valid, 1139 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:23:27,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66667 states. [2021-12-22 09:23:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66667 to 65861. [2021-12-22 09:23:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65861 states, 65860 states have (on average 1.1312784694807168) internal successors, (74506), 65860 states have internal predecessors, (74506), 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) [2021-12-22 09:23:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65861 states to 65861 states and 74506 transitions. [2021-12-22 09:23:28,059 INFO L78 Accepts]: Start accepts. Automaton has 65861 states and 74506 transitions. Word has length 392 [2021-12-22 09:23:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:28,059 INFO L470 AbstractCegarLoop]: Abstraction has 65861 states and 74506 transitions. [2021-12-22 09:23:28,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 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) [2021-12-22 09:23:28,059 INFO L276 IsEmpty]: Start isEmpty. Operand 65861 states and 74506 transitions. [2021-12-22 09:23:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-22 09:23:28,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:28,065 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:28,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 09:23:28,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 09:23:28,281 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1692395044, now seen corresponding path program 1 times [2021-12-22 09:23:28,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:28,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009245073] [2021-12-22 09:23:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:28,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:28,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:23:28,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:28,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009245073] [2021-12-22 09:23:28,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009245073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:28,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:28,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:28,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432057795] [2021-12-22 09:23:28,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:28,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:28,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:28,384 INFO L87 Difference]: Start difference. First operand 65861 states and 74506 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-22 09:23:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:32,489 INFO L93 Difference]: Finished difference Result 161805 states and 183745 transitions. [2021-12-22 09:23:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 392 [2021-12-22 09:23:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:32,608 INFO L225 Difference]: With dead ends: 161805 [2021-12-22 09:23:32,609 INFO L226 Difference]: Without dead ends: 96733 [2021-12-22 09:23:32,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:32,639 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 975 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2989 mSolverCounterSat, 846 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 3835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 846 IncrementalHoareTripleChecker+Valid, 2989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:32,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 464 Invalid, 3835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [846 Valid, 2989 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-22 09:23:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96733 states. [2021-12-22 09:23:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96733 to 95829. [2021-12-22 09:23:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95829 states, 95828 states have (on average 1.1344596568852527) internal successors, (108713), 95828 states have internal predecessors, (108713), 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) [2021-12-22 09:23:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95829 states to 95829 states and 108713 transitions. [2021-12-22 09:23:33,841 INFO L78 Accepts]: Start accepts. Automaton has 95829 states and 108713 transitions. Word has length 392 [2021-12-22 09:23:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:33,841 INFO L470 AbstractCegarLoop]: Abstraction has 95829 states and 108713 transitions. [2021-12-22 09:23:33,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 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) [2021-12-22 09:23:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 95829 states and 108713 transitions. [2021-12-22 09:23:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2021-12-22 09:23:33,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:33,851 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:33,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:23:33,851 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -373450363, now seen corresponding path program 1 times [2021-12-22 09:23:33,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:33,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427009826] [2021-12-22 09:23:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:33,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-12-22 09:23:33,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:33,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427009826] [2021-12-22 09:23:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427009826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:33,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:33,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:33,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946990285] [2021-12-22 09:23:33,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:33,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:23:33,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:33,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:23:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:23:33,944 INFO L87 Difference]: Start difference. First operand 95829 states and 108713 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-12-22 09:23:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:40,746 INFO L93 Difference]: Finished difference Result 267516 states and 305475 transitions. [2021-12-22 09:23:40,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:23:40,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 427 [2021-12-22 09:23:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:40,955 INFO L225 Difference]: With dead ends: 267516 [2021-12-22 09:23:40,955 INFO L226 Difference]: Without dead ends: 173263 [2021-12-22 09:23:40,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:23:40,988 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 1739 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 6737 mSolverCounterSat, 1106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 7843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1106 IncrementalHoareTripleChecker+Valid, 6737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:40,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 786 Invalid, 7843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1106 Valid, 6737 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-22 09:23:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173263 states. [2021-12-22 09:23:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173263 to 173067. [2021-12-22 09:23:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173067 states, 173066 states have (on average 1.1325274750673153) internal successors, (196002), 173066 states have internal predecessors, (196002), 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) [2021-12-22 09:23:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173067 states to 173067 states and 196002 transitions. [2021-12-22 09:23:43,060 INFO L78 Accepts]: Start accepts. Automaton has 173067 states and 196002 transitions. Word has length 427 [2021-12-22 09:23:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:43,061 INFO L470 AbstractCegarLoop]: Abstraction has 173067 states and 196002 transitions. [2021-12-22 09:23:43,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2021-12-22 09:23:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 173067 states and 196002 transitions. [2021-12-22 09:23:43,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-12-22 09:23:43,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:43,072 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:43,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:23:43,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:43,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1281024426, now seen corresponding path program 1 times [2021-12-22 09:23:43,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:43,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817472453] [2021-12-22 09:23:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:43,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:43,419 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 429 proven. 113 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-22 09:23:43,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817472453] [2021-12-22 09:23:43,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817472453] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:23:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675083445] [2021-12-22 09:23:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:43,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:23:43,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:23:43,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:23:43,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:23:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:23:43,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:23:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-22 09:23:44,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:23:44,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675083445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:44,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:23:44,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-22 09:23:44,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309883550] [2021-12-22 09:23:44,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:44,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:44,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:44,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:44,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:23:44,645 INFO L87 Difference]: Start difference. First operand 173067 states and 196002 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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)