./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.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 eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:40:34,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:40:34,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:40:34,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:40:34,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:40:34,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:40:34,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:40:34,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:40:34,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:40:34,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:40:34,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:40:34,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:40:34,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:40:34,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:40:34,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:40:34,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:40:34,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:40:34,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:40:34,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:40:34,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:40:34,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:40:34,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:40:34,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:40:34,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:40:34,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:40:34,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:40:34,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:40:34,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:40:34,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:40:34,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:40:34,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:40:34,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:40:34,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:40:34,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:40:34,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:40:34,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:40:34,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:40:34,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:40:34,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:40:34,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:40:34,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:40:34,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:40:34,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:40:34,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:40:34,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:40:34,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:40:34,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:40:34,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:40:34,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:40:34,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:40:34,127 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:40:34,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:40:34,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:40:34,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:40:34,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:40:34,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:40:34,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:40:34,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:40:34,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:40:34,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:40:34,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:40:34,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:40:34,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:40:34,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:40:34,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb57cc67b4a5d1052a722feccb00a81098424cf4bc0bbd7bfe756405ab740d43 [2021-12-22 11:40:34,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:40:34,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:40:34,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:40:34,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:40:34,353 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:40:34,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2021-12-22 11:40:34,398 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f38a3604e/3bbd8a8bfb8d4f4cbf0516c267730bb5/FLAG99dfe4d16 [2021-12-22 11:40:34,743 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:40:34,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2021-12-22 11:40:34,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f38a3604e/3bbd8a8bfb8d4f4cbf0516c267730bb5/FLAG99dfe4d16 [2021-12-22 11:40:34,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f38a3604e/3bbd8a8bfb8d4f4cbf0516c267730bb5 [2021-12-22 11:40:34,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:40:34,765 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:40:34,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:40:34,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:40:34,770 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:40:34,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b41c546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34, skipping insertion in model container [2021-12-22 11:40:34,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:40:34,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:40:34,917 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_2calls_5-2.c[946,959] [2021-12-22 11:40:34,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:40:34,924 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:40:34,937 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_2calls_5-2.c[946,959] [2021-12-22 11:40:34,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:40:34,948 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:40:34,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34 WrapperNode [2021-12-22 11:40:34,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:40:34,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:40:34,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:40:34,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:40:34,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,970 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-22 11:40:34,971 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:40:34,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:40:34,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:40:34,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:40:34,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:34,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:40:34,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:40:34,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:40:34,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:40:34,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (1/1) ... [2021-12-22 11:40:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:40:35,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:35,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:40:35,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:40:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:40:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:40:35,056 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-22 11:40:35,057 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-22 11:40:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-22 11:40:35,057 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-22 11:40:35,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:40:35,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:40:35,097 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:40:35,098 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:40:35,174 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:40:35,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:40:35,178 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 11:40:35,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:40:35 BoogieIcfgContainer [2021-12-22 11:40:35,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:40:35,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:40:35,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:40:35,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:40:35,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:40:34" (1/3) ... [2021-12-22 11:40:35,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df66568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:40:35, skipping insertion in model container [2021-12-22 11:40:35,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:40:34" (2/3) ... [2021-12-22 11:40:35,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5df66568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:40:35, skipping insertion in model container [2021-12-22 11:40:35,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:40:35" (3/3) ... [2021-12-22 11:40:35,188 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2021-12-22 11:40:35,192 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:40:35,192 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:40:35,236 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:40:35,240 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:40:35,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:40:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-22 11:40:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 11:40:35,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:35,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:35,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:35,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-22 11:40:35,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:35,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922111732] [2021-12-22 11:40:35,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:35,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:40:35,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922111732] [2021-12-22 11:40:35,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922111732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:40:35,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:40:35,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:40:35,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553127921] [2021-12-22 11:40:35,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:40:35,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:40:35,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:40:35,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:40:35,466 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-12-22 11:40:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:35,505 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-22 11:40:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:40:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2021-12-22 11:40:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:35,515 INFO L225 Difference]: With dead ends: 43 [2021-12-22 11:40:35,515 INFO L226 Difference]: Without dead ends: 27 [2021-12-22 11:40:35,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:40:35,523 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:35,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:40:35,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-22 11:40:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-22 11:40:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 11:40:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-22 11:40:35,563 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-12-22 11:40:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:35,563 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-22 11:40:35,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-12-22 11:40:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-22 11:40:35,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-22 11:40:35,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:35,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:35,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:40:35,567 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:35,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-12-22 11:40:35,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:35,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065221489] [2021-12-22 11:40:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:35,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:40:35,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065221489] [2021-12-22 11:40:35,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065221489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:40:35,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:40:35,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:40:35,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324810421] [2021-12-22 11:40:35,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:40:35,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:40:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:40:35,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:40:35,639 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2021-12-22 11:40:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:35,652 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-22 11:40:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:40:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2021-12-22 11:40:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:35,654 INFO L225 Difference]: With dead ends: 33 [2021-12-22 11:40:35,654 INFO L226 Difference]: Without dead ends: 29 [2021-12-22 11:40:35,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:40:35,655 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:35,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:40:35,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-22 11:40:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-22 11:40:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-22 11:40:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-22 11:40:35,662 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-12-22 11:40:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-22 11:40:35,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2021-12-22 11:40:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-22 11:40:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 11:40:35,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:35,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:35,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:40:35,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-12-22 11:40:35,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:35,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027933446] [2021-12-22 11:40:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:35,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:40:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:35,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:35,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027933446] [2021-12-22 11:40:35,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027933446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:35,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36975658] [2021-12-22 11:40:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:35,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:35,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:35,768 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:40:35,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:40:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:35,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 11:40:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:36,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:36,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36975658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:36,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:36,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-22 11:40:36,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284193660] [2021-12-22 11:40:36,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:36,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 11:40:36,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 11:40:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:40:36,216 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-12-22 11:40:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:36,359 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-12-22 11:40:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:40:36,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 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 [2021-12-22 11:40:36,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:36,361 INFO L225 Difference]: With dead ends: 55 [2021-12-22 11:40:36,361 INFO L226 Difference]: Without dead ends: 31 [2021-12-22 11:40:36,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:40:36,363 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:36,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:40:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-22 11:40:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-22 11:40:36,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 11:40:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-22 11:40:36,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-12-22 11:40:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:36,369 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-22 11:40:36,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-12-22 11:40:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-22 11:40:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-22 11:40:36,370 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:36,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:36,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:36,594 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 [2021-12-22 11:40:36,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-12-22 11:40:36,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:36,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721375295] [2021-12-22 11:40:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:36,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:36,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:36,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:36,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:36,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721375295] [2021-12-22 11:40:36,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721375295] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979828810] [2021-12-22 11:40:36,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:36,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:36,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 11:40:36,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:40:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 11:40:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:36,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 11:40:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979828810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:37,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:37,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-22 11:40:37,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223518033] [2021-12-22 11:40:37,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 11:40:37,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 11:40:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-22 11:40:37,006 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-12-22 11:40:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:37,135 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-22 11:40:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:40:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 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 [2021-12-22 11:40:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:37,137 INFO L225 Difference]: With dead ends: 51 [2021-12-22 11:40:37,137 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 11:40:37,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:40:37,138 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:37,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:40:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 11:40:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-22 11:40:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-22 11:40:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-22 11:40:37,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-12-22 11:40:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:37,150 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-22 11:40:37,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 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) [2021-12-22 11:40:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-22 11:40:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 11:40:37,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:37,152 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:37,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:37,354 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 [2021-12-22 11:40:37,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-12-22 11:40:37,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:37,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610291498] [2021-12-22 11:40:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:37,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 11:40:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 11:40:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:40:37,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610291498] [2021-12-22 11:40:37,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610291498] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:37,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423705902] [2021-12-22 11:40:37,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:37,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:37,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:37,484 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) [2021-12-22 11:40:37,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 11:40:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:37,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:40:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 11:40:37,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:40:37,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423705902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:37,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:37,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-12-22 11:40:37,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262768190] [2021-12-22 11:40:37,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:37,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 11:40:37,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:37,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 11:40:37,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:40:37,918 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 11:40:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:38,090 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-12-22 11:40:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 11:40:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-12-22 11:40:38,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:38,093 INFO L225 Difference]: With dead ends: 105 [2021-12-22 11:40:38,093 INFO L226 Difference]: Without dead ends: 63 [2021-12-22 11:40:38,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-22 11:40:38,096 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:38,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 118 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:40:38,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-22 11:40:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-22 11:40:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-22 11:40:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-12-22 11:40:38,110 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-12-22 11:40:38,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:38,110 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-12-22 11:40:38,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 11:40:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-12-22 11:40:38,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:40:38,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:38,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:38,311 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 [2021-12-22 11:40:38,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-12-22 11:40:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:38,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139265470] [2021-12-22 11:40:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-22 11:40:38,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:38,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139265470] [2021-12-22 11:40:38,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139265470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954247517] [2021-12-22 11:40:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:38,386 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) [2021-12-22 11:40:38,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 11:40:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:38,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:40:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:40:38,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:40:38,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954247517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:38,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:38,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-12-22 11:40:38,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583858125] [2021-12-22 11:40:38,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:38,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 11:40:38,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:38,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 11:40:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:40:38,765 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 11:40:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:39,035 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-12-22 11:40:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 11:40:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-12-22 11:40:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:39,041 INFO L225 Difference]: With dead ends: 177 [2021-12-22 11:40:39,041 INFO L226 Difference]: Without dead ends: 117 [2021-12-22 11:40:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:40:39,047 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:39,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 276 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:40:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-22 11:40:39,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-12-22 11:40:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-12-22 11:40:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-12-22 11:40:39,073 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-12-22 11:40:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:39,074 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-12-22 11:40:39,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-22 11:40:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-12-22 11:40:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:40:39,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:39,077 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:39,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:39,294 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 [2021-12-22 11:40:39,295 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:39,295 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-12-22 11:40:39,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139969288] [2021-12-22 11:40:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:39,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:39,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 11:40:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-22 11:40:39,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139969288] [2021-12-22 11:40:39,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139969288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409395817] [2021-12-22 11:40:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:39,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:39,406 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) [2021-12-22 11:40:39,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 11:40:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:39,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 11:40:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 11:40:39,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:40:39,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409395817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:39,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:39,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 19 [2021-12-22 11:40:39,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829080436] [2021-12-22 11:40:39,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:39,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 11:40:39,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 11:40:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-12-22 11:40:39,942 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-22 11:40:40,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:40,221 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-12-22 11:40:40,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 11:40:40,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) Word has length 51 [2021-12-22 11:40:40,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:40,224 INFO L225 Difference]: With dead ends: 255 [2021-12-22 11:40:40,224 INFO L226 Difference]: Without dead ends: 155 [2021-12-22 11:40:40,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-22 11:40:40,225 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 100 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:40,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 195 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:40:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-22 11:40:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-12-22 11:40:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-12-22 11:40:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-12-22 11:40:40,238 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-12-22 11:40:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:40,239 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-12-22 11:40:40,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (15), 1 states have call predecessors, (15), 8 states have return successors, (17), 7 states have call predecessors, (17), 13 states have call successors, (17) [2021-12-22 11:40:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-12-22 11:40:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 11:40:40,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:40,241 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:40,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:40,460 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 [2021-12-22 11:40:40,460 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1851863125, now seen corresponding path program 1 times [2021-12-22 11:40:40,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:40,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807660217] [2021-12-22 11:40:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:40,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:40:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 11:40:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-22 11:40:40,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:40,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807660217] [2021-12-22 11:40:40,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807660217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:40,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207216516] [2021-12-22 11:40:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:40,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:40,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:40,609 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) [2021-12-22 11:40:40,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 11:40:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:40:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 11:40:40,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-22 11:40:41,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207216516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:41,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:41,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 19 [2021-12-22 11:40:41,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150290887] [2021-12-22 11:40:41,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:41,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 11:40:41,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 11:40:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-22 11:40:41,106 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-22 11:40:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:41,369 INFO L93 Difference]: Finished difference Result 241 states and 471 transitions. [2021-12-22 11:40:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 11:40:41,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) Word has length 79 [2021-12-22 11:40:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:41,371 INFO L225 Difference]: With dead ends: 241 [2021-12-22 11:40:41,371 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 11:40:41,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:40:41,373 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 81 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:41,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 213 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:40:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 11:40:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2021-12-22 11:40:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 67 states have internal predecessors, (80), 19 states have call successors, (19), 10 states have call predecessors, (19), 12 states have return successors, (52), 20 states have call predecessors, (52), 19 states have call successors, (52) [2021-12-22 11:40:41,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 151 transitions. [2021-12-22 11:40:41,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 151 transitions. Word has length 79 [2021-12-22 11:40:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:41,382 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 151 transitions. [2021-12-22 11:40:41,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 12 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 11 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-22 11:40:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 151 transitions. [2021-12-22 11:40:41,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 11:40:41,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:41,384 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:41,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:41,595 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 [2021-12-22 11:40:41,596 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 502211684, now seen corresponding path program 2 times [2021-12-22 11:40:41,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192719221] [2021-12-22 11:40:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:41,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:40:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 11:40:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 11:40:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 140 proven. 160 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-22 11:40:41,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192719221] [2021-12-22 11:40:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192719221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:41,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313928770] [2021-12-22 11:40:41,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:40:41,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:41,862 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) [2021-12-22 11:40:41,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 11:40:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:40:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:40:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 11:40:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-22 11:40:42,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-12-22 11:40:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313928770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:42,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:42,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 13] total 32 [2021-12-22 11:40:42,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487656599] [2021-12-22 11:40:42,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:42,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-22 11:40:42,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:42,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-22 11:40:42,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-12-22 11:40:42,954 INFO L87 Difference]: Start difference. First operand 98 states and 151 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2021-12-22 11:40:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:43,482 INFO L93 Difference]: Finished difference Result 230 states and 432 transitions. [2021-12-22 11:40:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-22 11:40:43,482 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) Word has length 148 [2021-12-22 11:40:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:43,484 INFO L225 Difference]: With dead ends: 230 [2021-12-22 11:40:43,484 INFO L226 Difference]: Without dead ends: 114 [2021-12-22 11:40:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 325 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 11:40:43,485 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 206 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:43,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 348 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 11:40:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-22 11:40:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-12-22 11:40:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 67 states have internal predecessors, (82), 17 states have call successors, (17), 11 states have call predecessors, (17), 12 states have return successors, (36), 17 states have call predecessors, (36), 17 states have call successors, (36) [2021-12-22 11:40:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2021-12-22 11:40:43,492 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 148 [2021-12-22 11:40:43,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:43,492 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2021-12-22 11:40:43,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 32 states have internal predecessors, (89), 20 states have call successors, (26), 1 states have call predecessors, (26), 14 states have return successors, (33), 20 states have call predecessors, (33), 20 states have call successors, (33) [2021-12-22 11:40:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2021-12-22 11:40:43,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 11:40:43,493 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:43,494 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:43,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-22 11:40:43,705 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 [2021-12-22 11:40:43,705 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash 882144864, now seen corresponding path program 1 times [2021-12-22 11:40:43,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:43,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894671197] [2021-12-22 11:40:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:43,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:40:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 11:40:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:43,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 79 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-22 11:40:43,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:43,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894671197] [2021-12-22 11:40:43,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894671197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:43,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038207621] [2021-12-22 11:40:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:43,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:43,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:43,888 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) [2021-12-22 11:40:43,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 11:40:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:40:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-22 11:40:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-22 11:40:44,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038207621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:44,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:44,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 9] total 19 [2021-12-22 11:40:44,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315514940] [2021-12-22 11:40:44,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:44,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-22 11:40:44,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:44,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-22 11:40:44,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-22 11:40:44,425 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-12-22 11:40:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:44,611 INFO L93 Difference]: Finished difference Result 196 states and 283 transitions. [2021-12-22 11:40:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 11:40:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) Word has length 92 [2021-12-22 11:40:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:44,612 INFO L225 Difference]: With dead ends: 196 [2021-12-22 11:40:44,612 INFO L226 Difference]: Without dead ends: 109 [2021-12-22 11:40:44,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-12-22 11:40:44,613 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:44,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 239 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:40:44,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-12-22 11:40:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-12-22 11:40:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 71 states have internal predecessors, (88), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2021-12-22 11:40:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2021-12-22 11:40:44,619 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 92 [2021-12-22 11:40:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:44,620 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2021-12-22 11:40:44,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.5) internal successors, (63), 19 states have internal predecessors, (63), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 12 states have call predecessors, (21), 11 states have call successors, (21) [2021-12-22 11:40:44,620 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2021-12-22 11:40:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-22 11:40:44,621 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:44,621 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:44,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:44,840 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 [2021-12-22 11:40:44,840 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash -574358487, now seen corresponding path program 2 times [2021-12-22 11:40:44,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:44,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314234355] [2021-12-22 11:40:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:44,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 11:40:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 11:40:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 11:40:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 11:40:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:44,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 11:40:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:45,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 11:40:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:40:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 58 proven. 98 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-22 11:40:45,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:40:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314234355] [2021-12-22 11:40:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314234355] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:40:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212694595] [2021-12-22 11:40:45,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 11:40:45,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:40:45,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:40:45,006 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) [2021-12-22 11:40:45,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 11:40:45,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 11:40:45,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 11:40:45,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 11:40:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:40:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-22 11:40:45,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:40:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 57 proven. 63 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-22 11:40:45,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212694595] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:40:45,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:40:45,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 11] total 24 [2021-12-22 11:40:45,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482167315] [2021-12-22 11:40:45,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:40:45,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 11:40:45,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:40:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 11:40:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-12-22 11:40:45,734 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-22 11:40:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:40:45,931 INFO L93 Difference]: Finished difference Result 206 states and 292 transitions. [2021-12-22 11:40:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 11:40:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) Word has length 107 [2021-12-22 11:40:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:40:45,949 INFO L225 Difference]: With dead ends: 206 [2021-12-22 11:40:45,949 INFO L226 Difference]: Without dead ends: 113 [2021-12-22 11:40:45,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 234 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-12-22 11:40:45,951 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:40:45,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 196 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:40:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-22 11:40:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2021-12-22 11:40:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 69 states have internal predecessors, (86), 18 states have call successors, (18), 13 states have call predecessors, (18), 11 states have return successors, (31), 17 states have call predecessors, (31), 18 states have call successors, (31) [2021-12-22 11:40:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 135 transitions. [2021-12-22 11:40:45,962 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 135 transitions. Word has length 107 [2021-12-22 11:40:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:40:45,962 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 135 transitions. [2021-12-22 11:40:45,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.347826086956522) internal successors, (77), 24 states have internal predecessors, (77), 15 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 15 states have call predecessors, (27), 15 states have call successors, (27) [2021-12-22 11:40:45,963 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 135 transitions. [2021-12-22 11:40:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-22 11:40:45,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:40:45,964 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:45,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 11:40:46,171 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 [2021-12-22 11:40:46,171 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:40:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:40:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2118534433, now seen corresponding path program 3 times [2021-12-22 11:40:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:40:46,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90754015] [2021-12-22 11:40:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:40:46,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:40:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 11:40:46,182 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 11:40:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 11:40:46,209 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 11:40:46,209 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 11:40:46,210 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 11:40:46,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:40:46,214 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:40:46,216 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 11:40:46,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 11:40:46 BoogieIcfgContainer [2021-12-22 11:40:46,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 11:40:46,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 11:40:46,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 11:40:46,249 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 11:40:46,249 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:40:35" (3/4) ... [2021-12-22 11:40:46,250 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 11:40:46,285 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 11:40:46,285 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 11:40:46,286 INFO L158 Benchmark]: Toolchain (without parser) took 11520.38ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 80.8MB in the beginning and 93.2MB in the end (delta: -12.4MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,286 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 77.6MB. Free memory is still 34.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:40:46,286 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.73ms. Allocated memory is still 111.1MB. Free memory was 80.5MB in the beginning and 88.4MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.29ms. Allocated memory is still 111.1MB. Free memory was 87.9MB in the beginning and 86.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,287 INFO L158 Benchmark]: Boogie Preprocessor took 23.89ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 923.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 11:40:46,287 INFO L158 Benchmark]: RCFGBuilder took 183.99ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 76.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,287 INFO L158 Benchmark]: TraceAbstraction took 11067.45ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 76.2MB in the beginning and 97.4MB in the end (delta: -21.2MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,287 INFO L158 Benchmark]: Witness Printer took 36.70ms. Allocated memory is still 161.5MB. Free memory was 97.4MB in the beginning and 93.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-22 11:40:46,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 77.6MB. Free memory is still 34.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.73ms. Allocated memory is still 111.1MB. Free memory was 80.5MB in the beginning and 88.4MB in the end (delta: -7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.29ms. Allocated memory is still 111.1MB. Free memory was 87.9MB in the beginning and 86.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.89ms. Allocated memory is still 111.1MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 923.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 183.99ms. Allocated memory is still 111.1MB. Free memory was 85.8MB in the beginning and 76.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 11067.45ms. Allocated memory was 111.1MB in the beginning and 161.5MB in the end (delta: 50.3MB). Free memory was 76.2MB in the beginning and 97.4MB in the end (delta: -21.2MB). Peak memory consumption was 30.6MB. Max. memory is 16.1GB. * Witness Printer took 36.70ms. Allocated memory is still 161.5MB. Free memory was 97.4MB in the beginning and 93.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 5; VAL [x=5] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=5, x=5] [L39] int result = fibo1(x); [L40] COND TRUE result == 5 VAL [result=5, x=5] [L41] reach_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.0s, OverallIterations: 12, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 766 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 698 mSDsluCounter, 2097 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1793 mSDsCounter, 743 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2910 IncrementalHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 743 mSolverCounterUnsat, 304 mSDtfsCounter, 2910 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1543 GetRequests, 1300 SyntacticMatches, 17 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=7, InterpolantAutomatonStates: 169, 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, 125 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 1321 NumberOfCodeBlocks, 1321 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1783 ConstructedInterpolants, 0 QuantifiedInterpolants, 3528 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1539 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 2771/3702 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 RESULT: Ultimate proved your program to be incorrect! [2021-12-22 11:40:46,318 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE