./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:24:22,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:24:22,777 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:24:22,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:24:22,815 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:24:22,818 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:24:22,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:24:22,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:24:22,827 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:24:22,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:24:22,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:24:22,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:24:22,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:24:22,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:24:22,841 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:24:22,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:24:22,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:24:22,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:24:22,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:24:22,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:24:22,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:24:22,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:24:22,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:24:22,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:24:22,866 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:24:22,867 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:24:22,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:24:22,868 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:24:22,869 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:24:22,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:24:22,870 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:24:22,871 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:24:22,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:24:22,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:24:22,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:24:22,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:24:22,875 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:24:22,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:24:22,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:24:22,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:24:22,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:24:22,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:24:22,912 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:24:22,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:24:22,913 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:24:22,913 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:24:22,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:24:22,914 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:24:22,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:24:22,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:24:22,914 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:24:22,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:24:22,914 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:24:22,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:24:22,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:24:22,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:24:22,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:24:22,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:24:22,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb [2021-12-17 15:24:23,097 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:24:23,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:24:23,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:24:23,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:24:23,125 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:24:23,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2021-12-17 15:24:23,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a2a0f62/a3e0307d01904194ac9429c064bb19ef/FLAGffa498523 [2021-12-17 15:24:23,532 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:24:23,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2021-12-17 15:24:23,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a2a0f62/a3e0307d01904194ac9429c064bb19ef/FLAGffa498523 [2021-12-17 15:24:23,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a2a0f62/a3e0307d01904194ac9429c064bb19ef [2021-12-17 15:24:23,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:24:23,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:24:23,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:24:23,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:24:23,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:24:23,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:24:23" (1/1) ... [2021-12-17 15:24:23,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61579352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:23, skipping insertion in model container [2021-12-17 15:24:23,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:24:23" (1/1) ... [2021-12-17 15:24:23,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:24:23,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:24:24,154 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2021-12-17 15:24:24,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:24:24,168 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:24:24,184 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2021-12-17 15:24:24,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:24:24,198 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:24:24,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24 WrapperNode [2021-12-17 15:24:24,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:24:24,200 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:24:24,200 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:24:24,201 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:24:24,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,227 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-17 15:24:24,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:24:24,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:24:24,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:24:24,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:24:24,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:24:24,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:24:24,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:24:24,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:24:24,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (1/1) ... [2021-12-17 15:24:24,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:24:24,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:24,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 15:24:24,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 15:24:24,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:24:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:24:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:24:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:24:24,330 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-12-17 15:24:24,330 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-12-17 15:24:24,379 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:24:24,381 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:24:24,496 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:24:24,501 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:24:24,501 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-17 15:24:24,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:24:24 BoogieIcfgContainer [2021-12-17 15:24:24,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:24:24,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:24:24,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:24:24,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:24:24,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:24:23" (1/3) ... [2021-12-17 15:24:24,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37379805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:24:24, skipping insertion in model container [2021-12-17 15:24:24,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:24:24" (2/3) ... [2021-12-17 15:24:24,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37379805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:24:24, skipping insertion in model container [2021-12-17 15:24:24,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:24:24" (3/3) ... [2021-12-17 15:24:24,510 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2021-12-17 15:24:24,514 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:24:24,514 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:24:24,557 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:24:24,565 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 15:24:24,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:24:24,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-17 15:24:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 15:24:24,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:24,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:24,590 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:24,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1755511548, now seen corresponding path program 1 times [2021-12-17 15:24:24,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522594526] [2021-12-17 15:24:24,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:24,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:24:24,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522594526] [2021-12-17 15:24:24,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522594526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:24:24,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:24:24,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:24:24,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834014500] [2021-12-17 15:24:24,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:24:24,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:24:24,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:24,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:24:24,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:24:24,829 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:24:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:24,929 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-12-17 15:24:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:24:24,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-17 15:24:24,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:24,940 INFO L225 Difference]: With dead ends: 30 [2021-12-17 15:24:24,941 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 15:24:24,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:24:24,951 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:24,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:24:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 15:24:24,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 15:24:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 15:24:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-17 15:24:24,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-17 15:24:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:24,990 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-17 15:24:24,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:24:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-17 15:24:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-17 15:24:24,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:24,993 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:24,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:24:24,994 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:24,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2128459596, now seen corresponding path program 1 times [2021-12-17 15:24:24,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:24,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347449767] [2021-12-17 15:24:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:24,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:24:25,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:25,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347449767] [2021-12-17 15:24:25,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347449767] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:24:25,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:24:25,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:24:25,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538999515] [2021-12-17 15:24:25,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:24:25,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:24:25,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:24:25,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:24:25,098 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:24:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:25,140 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-12-17 15:24:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:24:25,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-17 15:24:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:25,142 INFO L225 Difference]: With dead ends: 24 [2021-12-17 15:24:25,142 INFO L226 Difference]: Without dead ends: 20 [2021-12-17 15:24:25,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:24:25,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:25,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:24:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-17 15:24:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-12-17 15:24:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 15:24:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-17 15:24:25,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2021-12-17 15:24:25,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:25,151 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-17 15:24:25,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-17 15:24:25,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-17 15:24:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 15:24:25,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:25,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:25,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:24:25,153 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:25,154 INFO L85 PathProgramCache]: Analyzing trace with hash -42544313, now seen corresponding path program 1 times [2021-12-17 15:24:25,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:25,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835123213] [2021-12-17 15:24:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:25,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 15:24:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:24:25,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:25,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835123213] [2021-12-17 15:24:25,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835123213] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:25,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849444745] [2021-12-17 15:24:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:25,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:25,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:25,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:25,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:24:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 15:24:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 15:24:25,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:24:25,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849444745] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:25,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 12 [2021-12-17 15:24:25,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667153136] [2021-12-17 15:24:25,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:25,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 15:24:25,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 15:24:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:24:25,596 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:24:25,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:25,666 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-17 15:24:25,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 15:24:25,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-12-17 15:24:25,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:25,668 INFO L225 Difference]: With dead ends: 35 [2021-12-17 15:24:25,668 INFO L226 Difference]: Without dead ends: 20 [2021-12-17 15:24:25,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-12-17 15:24:25,670 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:25,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 62 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:24:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-17 15:24:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-17 15:24:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-17 15:24:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-17 15:24:25,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2021-12-17 15:24:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:25,677 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-17 15:24:25,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-17 15:24:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-17 15:24:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 15:24:25,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:25,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:25,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:25,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:25,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 170813287, now seen corresponding path program 1 times [2021-12-17 15:24:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033851497] [2021-12-17 15:24:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:25,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:25,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:24:26,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033851497] [2021-12-17 15:24:26,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033851497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599547860] [2021-12-17 15:24:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:26,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:26,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:26,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:26,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 15:24:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 15:24:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 15:24:26,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:26,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 15:24:26,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599547860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:26,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:26,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2021-12-17 15:24:26,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947202305] [2021-12-17 15:24:26,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:26,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 15:24:26,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 15:24:26,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:24:26,303 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 15:24:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:26,393 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-17 15:24:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:24:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-12-17 15:24:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:26,396 INFO L225 Difference]: With dead ends: 38 [2021-12-17 15:24:26,398 INFO L226 Difference]: Without dead ends: 34 [2021-12-17 15:24:26,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-12-17 15:24:26,399 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:26,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:24:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-17 15:24:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-17 15:24:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-17 15:24:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2021-12-17 15:24:26,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2021-12-17 15:24:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2021-12-17 15:24:26,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-17 15:24:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2021-12-17 15:24:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-17 15:24:26,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:26,421 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:26,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:26,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 15:24:26,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -187634876, now seen corresponding path program 2 times [2021-12-17 15:24:26,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811179710] [2021-12-17 15:24:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:26,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:26,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-17 15:24:26,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:26,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811179710] [2021-12-17 15:24:26,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811179710] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123546360] [2021-12-17 15:24:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:24:26,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:26,810 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:26,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 15:24:26,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:24:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:24:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 15:24:26,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 15:24:27,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123546360] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:27,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:27,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 17 [2021-12-17 15:24:27,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027712296] [2021-12-17 15:24:27,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:27,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 15:24:27,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 15:24:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:24:27,262 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 15:24:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:27,426 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2021-12-17 15:24:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 15:24:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) Word has length 37 [2021-12-17 15:24:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:27,430 INFO L225 Difference]: With dead ends: 69 [2021-12-17 15:24:27,430 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 15:24:27,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-17 15:24:27,432 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:27,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 97 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:24:27,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 15:24:27,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 15:24:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-17 15:24:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-12-17 15:24:27,444 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2021-12-17 15:24:27,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:27,444 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-12-17 15:24:27,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (12), 1 states have call predecessors, (12), 7 states have return successors, (13), 6 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-17 15:24:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-12-17 15:24:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 15:24:27,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:27,446 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:27,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:27,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:27,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2015531204, now seen corresponding path program 3 times [2021-12-17 15:24:27,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762815754] [2021-12-17 15:24:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:27,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:27,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 15:24:27,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762815754] [2021-12-17 15:24:27,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762815754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:27,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382718347] [2021-12-17 15:24:27,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 15:24:27,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:27,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:27,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:27,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 15:24:27,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-17 15:24:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:24:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 22 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-17 15:24:28,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 65 proven. 29 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-17 15:24:28,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382718347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:28,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 9] total 17 [2021-12-17 15:24:28,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426062224] [2021-12-17 15:24:28,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:28,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 15:24:28,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:28,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 15:24:28,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-12-17 15:24:28,453 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-17 15:24:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:28,581 INFO L93 Difference]: Finished difference Result 85 states and 124 transitions. [2021-12-17 15:24:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:24:28,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) Word has length 65 [2021-12-17 15:24:28,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:28,588 INFO L225 Difference]: With dead ends: 85 [2021-12-17 15:24:28,589 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 15:24:28,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 138 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-12-17 15:24:28,597 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:28,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 59 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:24:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 15:24:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-12-17 15:24:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 32 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2021-12-17 15:24:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2021-12-17 15:24:28,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 65 [2021-12-17 15:24:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:28,615 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2021-12-17 15:24:28,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.933333333333333) internal successors, (44), 17 states have internal predecessors, (44), 10 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2021-12-17 15:24:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2021-12-17 15:24:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-17 15:24:28,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:28,622 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:28,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:28,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:28,835 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1033750100, now seen corresponding path program 4 times [2021-12-17 15:24:28,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901539879] [2021-12-17 15:24:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:28,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:28,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:28,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:28,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 57 proven. 377 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-12-17 15:24:29,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:29,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901539879] [2021-12-17 15:24:29,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901539879] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:29,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235237879] [2021-12-17 15:24:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 15:24:29,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:29,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:29,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:29,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 15:24:29,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 15:24:29,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 15:24:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 57 proven. 377 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-12-17 15:24:29,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 57 proven. 403 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-12-17 15:24:30,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235237879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:30,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:30,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13] total 20 [2021-12-17 15:24:30,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452303495] [2021-12-17 15:24:30,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:30,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-17 15:24:30,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-17 15:24:30,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-12-17 15:24:30,339 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 20 states, 18 states have (on average 3.0) internal successors, (54), 20 states have internal predecessors, (54), 17 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (24), 10 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-17 15:24:30,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:30,493 INFO L93 Difference]: Finished difference Result 117 states and 176 transitions. [2021-12-17 15:24:30,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 15:24:30,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.0) internal successors, (54), 20 states have internal predecessors, (54), 17 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (24), 10 states have call predecessors, (24), 17 states have call successors, (24) Word has length 147 [2021-12-17 15:24:30,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:30,499 INFO L225 Difference]: With dead ends: 117 [2021-12-17 15:24:30,499 INFO L226 Difference]: Without dead ends: 113 [2021-12-17 15:24:30,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-12-17 15:24:30,500 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:30,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 87 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:24:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-17 15:24:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2021-12-17 15:24:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 68 states have internal predecessors, (82), 21 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (56), 26 states have call predecessors, (56), 21 states have call successors, (56) [2021-12-17 15:24:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 159 transitions. [2021-12-17 15:24:30,527 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 159 transitions. Word has length 147 [2021-12-17 15:24:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:30,528 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 159 transitions. [2021-12-17 15:24:30,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.0) internal successors, (54), 20 states have internal predecessors, (54), 17 states have call successors, (18), 1 states have call predecessors, (18), 6 states have return successors, (24), 10 states have call predecessors, (24), 17 states have call successors, (24) [2021-12-17 15:24:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 159 transitions. [2021-12-17 15:24:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-17 15:24:30,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:30,534 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:30,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:30,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:30,760 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash -943421620, now seen corresponding path program 5 times [2021-12-17 15:24:30,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537429358] [2021-12-17 15:24:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:30,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:30,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:24:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:31,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 393 proven. 617 refuted. 0 times theorem prover too weak. 1231 trivial. 0 not checked. [2021-12-17 15:24:31,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:31,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537429358] [2021-12-17 15:24:31,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537429358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780383300] [2021-12-17 15:24:31,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 15:24:31,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:31,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:31,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:31,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 15:24:31,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-17 15:24:31,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:31,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 15:24:31,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 620 proven. 476 refuted. 0 times theorem prover too weak. 1145 trivial. 0 not checked. [2021-12-17 15:24:31,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 622 proven. 510 refuted. 0 times theorem prover too weak. 1109 trivial. 0 not checked. [2021-12-17 15:24:33,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780383300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:33,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:33,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 21] total 34 [2021-12-17 15:24:33,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438255207] [2021-12-17 15:24:33,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:33,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-17 15:24:33,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-17 15:24:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 15:24:33,408 INFO L87 Difference]: Start difference. First operand 104 states and 159 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 24 states have call successors, (42) [2021-12-17 15:24:33,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:33,871 INFO L93 Difference]: Finished difference Result 193 states and 365 transitions. [2021-12-17 15:24:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-17 15:24:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 24 states have call successors, (42) Word has length 201 [2021-12-17 15:24:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:33,874 INFO L225 Difference]: With dead ends: 193 [2021-12-17 15:24:33,874 INFO L226 Difference]: Without dead ends: 95 [2021-12-17 15:24:33,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 441 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 15:24:33,877 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 212 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:33,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 164 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:24:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-17 15:24:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 84. [2021-12-17 15:24:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 58 states have internal predecessors, (62), 15 states have call successors, (15), 12 states have call predecessors, (15), 8 states have return successors, (36), 13 states have call predecessors, (36), 15 states have call successors, (36) [2021-12-17 15:24:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 113 transitions. [2021-12-17 15:24:33,885 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 113 transitions. Word has length 201 [2021-12-17 15:24:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:33,886 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 113 transitions. [2021-12-17 15:24:33,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 34 states have internal predecessors, (91), 24 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 24 states have call successors, (42) [2021-12-17 15:24:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 113 transitions. [2021-12-17 15:24:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-12-17 15:24:33,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:33,889 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:33,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:34,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:34,107 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1099173212, now seen corresponding path program 6 times [2021-12-17 15:24:34,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:34,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696730775] [2021-12-17 15:24:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:34,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:24:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-17 15:24:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:34,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:35,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2021-12-17 15:24:35,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696730775] [2021-12-17 15:24:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696730775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951496190] [2021-12-17 15:24:35,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 15:24:35,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:35,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:35,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:35,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 15:24:35,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-12-17 15:24:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 167 conjunts are in the unsatisfiable core [2021-12-17 15:24:35,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2021-12-17 15:24:36,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 0 proven. 1500 refuted. 0 times theorem prover too weak. 3068 trivial. 0 not checked. [2021-12-17 15:24:39,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951496190] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:39,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:39,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2021-12-17 15:24:39,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890490926] [2021-12-17 15:24:39,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:39,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 15:24:39,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 15:24:39,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:24:39,200 INFO L87 Difference]: Start difference. First operand 84 states and 113 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 15:24:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:39,443 INFO L93 Difference]: Finished difference Result 105 states and 155 transitions. [2021-12-17 15:24:39,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 15:24:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) Word has length 283 [2021-12-17 15:24:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:39,445 INFO L225 Difference]: With dead ends: 105 [2021-12-17 15:24:39,445 INFO L226 Difference]: Without dead ends: 101 [2021-12-17 15:24:39,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 679 SyntacticMatches, 26 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-12-17 15:24:39,446 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 800 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 15:24:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-17 15:24:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-12-17 15:24:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 64 states have internal predecessors, (68), 17 states have call successors, (17), 12 states have call predecessors, (17), 10 states have return successors, (54), 17 states have call predecessors, (54), 17 states have call successors, (54) [2021-12-17 15:24:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 139 transitions. [2021-12-17 15:24:39,458 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 139 transitions. Word has length 283 [2021-12-17 15:24:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:39,458 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 139 transitions. [2021-12-17 15:24:39,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (7), 1 states have call predecessors, (7), 7 states have return successors, (18), 18 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 15:24:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 139 transitions. [2021-12-17 15:24:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 15:24:39,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:39,463 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 38, 23, 23, 23, 23, 23, 23, 23, 15, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:39,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:39,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:39,684 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:39,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:39,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1334891743, now seen corresponding path program 7 times [2021-12-17 15:24:39,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:39,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045711755] [2021-12-17 15:24:39,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:39,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:39,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:39,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:24:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-17 15:24:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:24:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1307 proven. 1260 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2021-12-17 15:24:40,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:40,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045711755] [2021-12-17 15:24:40,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045711755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:40,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040595969] [2021-12-17 15:24:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 15:24:40,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:40,276 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:40,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 15:24:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 15:24:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 467 refuted. 0 times theorem prover too weak. 4481 trivial. 0 not checked. [2021-12-17 15:24:40,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6039 backedges. 1091 proven. 518 refuted. 0 times theorem prover too weak. 4430 trivial. 0 not checked. [2021-12-17 15:24:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040595969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:42,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:42,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11, 17] total 35 [2021-12-17 15:24:42,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714807118] [2021-12-17 15:24:42,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:42,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-17 15:24:42,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:42,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-17 15:24:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2021-12-17 15:24:42,673 INFO L87 Difference]: Start difference. First operand 94 states and 139 transitions. Second operand has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 24 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (43), 25 states have call predecessors, (43), 24 states have call successors, (43) [2021-12-17 15:24:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:43,370 INFO L93 Difference]: Finished difference Result 227 states and 449 transitions. [2021-12-17 15:24:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-17 15:24:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 24 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (43), 25 states have call predecessors, (43), 24 states have call successors, (43) Word has length 324 [2021-12-17 15:24:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:43,373 INFO L225 Difference]: With dead ends: 227 [2021-12-17 15:24:43,373 INFO L226 Difference]: Without dead ends: 124 [2021-12-17 15:24:43,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 734 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=765, Invalid=2657, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 15:24:43,377 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:43,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 235 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 15:24:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-17 15:24:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-12-17 15:24:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 76 states have internal predecessors, (80), 21 states have call successors, (21), 16 states have call predecessors, (21), 10 states have return successors, (46), 17 states have call predecessors, (46), 21 states have call successors, (46) [2021-12-17 15:24:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 147 transitions. [2021-12-17 15:24:43,398 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 147 transitions. Word has length 324 [2021-12-17 15:24:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 147 transitions. [2021-12-17 15:24:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 35 states have internal predecessors, (87), 24 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (43), 25 states have call predecessors, (43), 24 states have call successors, (43) [2021-12-17 15:24:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 147 transitions. [2021-12-17 15:24:43,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-12-17 15:24:43,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:24:43,404 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:24:43,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:43,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 15:24:43,607 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:24:43,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:24:43,608 INFO L85 PathProgramCache]: Analyzing trace with hash -127946809, now seen corresponding path program 8 times [2021-12-17 15:24:43,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:24:43,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611085165] [2021-12-17 15:24:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:24:43,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:24:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 15:24:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:43,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 15:24:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-17 15:24:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:43,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-12-17 15:24:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:44,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-17 15:24:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 15:24:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 15:24:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 15:24:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 15:24:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:24:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 913 proven. 1281 refuted. 0 times theorem prover too weak. 4926 trivial. 0 not checked. [2021-12-17 15:24:44,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:24:44,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611085165] [2021-12-17 15:24:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611085165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:24:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100282628] [2021-12-17 15:24:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 15:24:44,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:24:44,136 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:24:44,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 15:24:44,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 15:24:44,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 15:24:44,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 15:24:44,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:24:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 419 proven. 1507 refuted. 0 times theorem prover too weak. 5194 trivial. 0 not checked. [2021-12-17 15:24:44,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:24:47,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7120 backedges. 419 proven. 1577 refuted. 0 times theorem prover too weak. 5124 trivial. 0 not checked. [2021-12-17 15:24:47,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100282628] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:24:47,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:24:47,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 19] total 33 [2021-12-17 15:24:47,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028918804] [2021-12-17 15:24:47,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:24:47,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-17 15:24:47,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:24:47,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-17 15:24:47,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2021-12-17 15:24:47,010 INFO L87 Difference]: Start difference. First operand 110 states and 147 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 26 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (43), 20 states have call predecessors, (43), 26 states have call successors, (43) [2021-12-17 15:24:47,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:24:47,411 INFO L93 Difference]: Finished difference Result 211 states and 294 transitions. [2021-12-17 15:24:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 15:24:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 26 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (43), 20 states have call predecessors, (43), 26 states have call successors, (43) Word has length 351 [2021-12-17 15:24:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:24:47,412 INFO L225 Difference]: With dead ends: 211 [2021-12-17 15:24:47,412 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 15:24:47,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 790 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=469, Invalid=1423, Unknown=0, NotChecked=0, Total=1892 [2021-12-17 15:24:47,414 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 98 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:24:47,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 204 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 15:24:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 15:24:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 15:24:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:24:47,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 15:24:47,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 351 [2021-12-17 15:24:47,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:24:47,415 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 15:24:47,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 26 states have call successors, (29), 1 states have call predecessors, (29), 14 states have return successors, (43), 20 states have call predecessors, (43), 26 states have call successors, (43) [2021-12-17 15:24:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 15:24:47,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 15:24:47,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 15:24:47,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 15:24:47,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:24:47,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 15:24:48,117 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-17 15:24:48,117 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-17 15:24:48,117 INFO L854 garLoopResultBuilder]: At program point L31(lines 25 32) the Hoare annotation is: (<= 7 |ULTIMATE.start_main_~x~0#1|) [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point L28(lines 28 30) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L854 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 7 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 7)) [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 29) no Hoare annotation was computed. [2021-12-17 15:24:48,118 INFO L858 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L858 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L854 garLoopResultBuilder]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo_~n) (= |fibo_#in~n| fibo_~n)) [2021-12-17 15:24:48,119 INFO L858 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L854 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (or (not (<= 5 |fibo_#in~n|)) (not (<= |fibo_#in~n| 5)) (and (<= |fibo_#t~ret4| 3) (<= 3 |fibo_#t~ret4|))) (let ((.cse0 (= |fibo_#in~n| fibo_~n))) (or (and (<= 8 |fibo_#in~n|) .cse0) (and (<= fibo_~n 6) .cse0) (and (<= |fibo_#t~ret4| 8) (<= 8 |fibo_#t~ret4|) .cse0))) (not (<= |fibo_#in~n| 1)) (or (and (<= |fibo_#t~ret4| 1) (<= 1 |fibo_#t~ret4|)) (not (<= |fibo_#in~n| 3))) (or (and (<= |fibo_#t~ret4| 2) (<= 2 |fibo_#t~ret4|)) (not (<= 4 |fibo_#in~n|)) (not (<= |fibo_#in~n| 4))) (or (<= fibo_~n 5) (and (<= |fibo_#t~ret4| 5) (<= 5 |fibo_#t~ret4|)) (<= 7 fibo_~n))) [2021-12-17 15:24:48,119 INFO L858 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L858 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L858 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2021-12-17 15:24:48,119 INFO L861 garLoopResultBuilder]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2021-12-17 15:24:48,122 INFO L732 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1] [2021-12-17 15:24:48,123 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 15:24:48,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 03:24:48 BoogieIcfgContainer [2021-12-17 15:24:48,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 15:24:48,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 15:24:48,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 15:24:48,135 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 15:24:48,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:24:24" (3/4) ... [2021-12-17 15:24:48,137 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-17 15:24:48,142 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2021-12-17 15:24:48,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-12-17 15:24:48,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-17 15:24:48,145 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-17 15:24:48,146 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-17 15:24:48,167 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 15:24:48,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 15:24:48,168 INFO L158 Benchmark]: Toolchain (without parser) took 24211.17ms. Allocated memory was 92.3MB in the beginning and 209.7MB in the end (delta: 117.4MB). Free memory was 62.1MB in the beginning and 162.4MB in the end (delta: -100.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,168 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory was 49.3MB in the beginning and 49.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:24:48,168 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.84ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 69.0MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,169 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.69ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 67.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,169 INFO L158 Benchmark]: Boogie Preprocessor took 17.92ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 66.9MB in the end (delta: 630.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 15:24:48,169 INFO L158 Benchmark]: RCFGBuilder took 255.12ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 58.6MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,170 INFO L158 Benchmark]: TraceAbstraction took 23630.24ms. Allocated memory was 92.3MB in the beginning and 209.7MB in the end (delta: 117.4MB). Free memory was 58.0MB in the beginning and 164.5MB in the end (delta: -106.5MB). Peak memory consumption was 118.6MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,170 INFO L158 Benchmark]: Witness Printer took 32.64ms. Allocated memory is still 209.7MB. Free memory was 164.5MB in the beginning and 162.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 15:24:48,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 92.3MB. Free memory was 49.3MB in the beginning and 49.3MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.84ms. Allocated memory is still 92.3MB. Free memory was 61.8MB in the beginning and 69.0MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.69ms. Allocated memory is still 92.3MB. Free memory was 69.0MB in the beginning and 67.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.92ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 66.9MB in the end (delta: 630.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.12ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 58.6MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 23630.24ms. Allocated memory was 92.3MB in the beginning and 209.7MB in the end (delta: 117.4MB). Free memory was 58.0MB in the beginning and 164.5MB in the end (delta: -106.5MB). Peak memory consumption was 118.6MB. Max. memory is 16.1GB. * Witness Printer took 32.64ms. Allocated memory is still 209.7MB. Free memory was 164.5MB in the beginning and 162.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 29]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 23.6s, OverallIterations: 11, TraceHistogramMax: 51, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 852 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 792 mSDsluCounter, 1827 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1571 mSDsCounter, 1043 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2827 IncrementalHoareTripleChecker+Invalid, 3870 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1043 mSolverCounterUnsat, 256 mSDtfsCounter, 2827 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3595 GetRequests, 3290 SyntacticMatches, 41 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=10, InterpolantAutomatonStates: 180, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 272 PreInvPairs, 405 NumberOfFragments, 106 HoareAnnotationTreeSize, 272 FomulaSimplifications, 1012 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 2422 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 17.0s InterpolantComputationTime, 2931 NumberOfCodeBlocks, 2851 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 4357 ConstructedInterpolants, 0 QuantifiedInterpolants, 9727 SizeOfPredicates, 41 NumberOfNonLiveVariables, 3199 ConjunctsInSsa, 261 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 50054/64155 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 7 <= x RESULT: Ultimate proved your program to be correct! [2021-12-17 15:24:48,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE