./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/Fibonacci04.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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3562c726fb0df5872bc6ae08c11ec0d40862c19 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:28:16,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:28:16,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:28:16,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:28:16,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:28:16,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:28:16,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:28:16,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:28:16,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:28:16,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:28:16,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:28:16,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:28:16,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:28:16,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:28:16,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:28:16,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:28:16,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:28:16,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:28:16,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:28:16,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:28:16,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:28:16,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:28:16,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:28:16,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:28:16,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:28:16,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:28:16,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:28:16,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:28:16,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:28:16,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:28:16,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:28:16,931 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:28:16,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:28:16,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:28:16,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:28:16,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:28:16,934 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:28:16,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:28:16,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:28:16,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:28:16,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:28:16,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:28:16,951 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:28:16,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:28:16,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:28:16,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:28:16,953 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:28:16,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:28:16,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:28:16,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:28:16,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:28:16,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:28:16,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:28:16,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:28:16,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:28:16,958 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:28:16,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:28:16,959 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:28:16,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:28:16,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:28:16,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:28:16,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:28:16,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:28:16,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:28:16,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:28:16,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:28:16,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:28:16,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:28:16,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:28:16,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:28:16,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:28:16,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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(__VERIFIER_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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2019-11-28 17:28:17,292 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:28:17,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:28:17,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:28:17,318 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:28:17,320 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:28:17,321 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-28 17:28:17,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae769aa9/cf6d69aa8e8d4eea85131ee6fe5c5dae/FLAG6738af5a3 [2019-11-28 17:28:17,871 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:28:17,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci04.c [2019-11-28 17:28:17,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae769aa9/cf6d69aa8e8d4eea85131ee6fe5c5dae/FLAG6738af5a3 [2019-11-28 17:28:18,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae769aa9/cf6d69aa8e8d4eea85131ee6fe5c5dae [2019-11-28 17:28:18,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:28:18,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:28:18,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:18,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:28:18,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:28:18,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61bd84bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18, skipping insertion in model container [2019-11-28 17:28:18,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:28:18,329 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:28:18,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:18,537 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:28:18,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:28:18,565 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:28:18,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18 WrapperNode [2019-11-28 17:28:18,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:28:18,567 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:18,567 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:28:18,567 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:28:18,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,580 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:28:18,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:28:18,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:28:18,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:28:18,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... [2019-11-28 17:28:18,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:28:18,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:28:18,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:28:18,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:28:18,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:28:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-28 17:28:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-28 17:28:18,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:28:18,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:28:18,895 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:28:18,896 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:28:18,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:18 BoogieIcfgContainer [2019-11-28 17:28:18,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:28:18,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:28:18,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:28:18,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:28:18,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:28:18" (1/3) ... [2019-11-28 17:28:18,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6440d13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:18, skipping insertion in model container [2019-11-28 17:28:18,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:28:18" (2/3) ... [2019-11-28 17:28:18,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6440d13c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:28:18, skipping insertion in model container [2019-11-28 17:28:18,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:18" (3/3) ... [2019-11-28 17:28:18,916 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-11-28 17:28:18,931 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:28:18,942 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:28:18,985 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:28:19,027 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:28:19,028 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:28:19,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:28:19,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:28:19,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:28:19,029 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:28:19,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:28:19,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:28:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-28 17:28:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:28:19,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:19,051 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:19,051 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 238562696, now seen corresponding path program 1 times [2019-11-28 17:28:19,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:19,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933691112] [2019-11-28 17:28:19,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:28:19,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933691112] [2019-11-28 17:28:19,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:28:19,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043913839] [2019-11-28 17:28:19,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:28:19,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:19,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:28:19,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:28:19,278 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-11-28 17:28:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:19,408 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-28 17:28:19,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:28:19,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:28:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:19,420 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:28:19,420 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:28:19,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:28:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:28:19,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:28:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:28:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 17:28:19,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-28 17:28:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:19,461 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 17:28:19,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:28:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 17:28:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:28:19,463 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:19,463 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:19,463 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash -497654578, now seen corresponding path program 1 times [2019-11-28 17:28:19,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:19,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68328183] [2019-11-28 17:28:19,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:28:19,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68328183] [2019-11-28 17:28:19,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:28:19,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:28:19,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872910748] [2019-11-28 17:28:19,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:28:19,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:19,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:28:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:28:19,544 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-28 17:28:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:19,610 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-28 17:28:19,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:28:19,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 17:28:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:19,612 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:28:19,612 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 17:28:19,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:28:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 17:28:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-28 17:28:19,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:28:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 17:28:19,621 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-28 17:28:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:19,621 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 17:28:19,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:28:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 17:28:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 17:28:19,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:19,623 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:19,623 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:19,624 INFO L82 PathProgramCache]: Analyzing trace with hash -850570499, now seen corresponding path program 1 times [2019-11-28 17:28:19,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:19,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536506721] [2019-11-28 17:28:19,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 17:28:19,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536506721] [2019-11-28 17:28:19,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437716178] [2019-11-28 17:28:19,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:19,829 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:28:19,836 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 17:28:19,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:19,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-11-28 17:28:19,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207521135] [2019-11-28 17:28:19,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:28:19,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:19,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:28:19,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:28:19,904 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 9 states. [2019-11-28 17:28:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:20,063 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-11-28 17:28:20,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:28:20,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-28 17:28:20,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:20,065 INFO L225 Difference]: With dead ends: 34 [2019-11-28 17:28:20,065 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 17:28:20,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:28:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 17:28:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-28 17:28:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 17:28:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-28 17:28:20,080 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2019-11-28 17:28:20,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:20,080 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-28 17:28:20,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:28:20,081 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-28 17:28:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:28:20,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:20,084 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:20,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:20,290 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1834230885, now seen corresponding path program 1 times [2019-11-28 17:28:20,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:20,291 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385107294] [2019-11-28 17:28:20,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:28:20,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385107294] [2019-11-28 17:28:20,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139859855] [2019-11-28 17:28:20,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 17:28:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:20,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:28:20,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:28:20,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:20,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 17:28:20,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250737920] [2019-11-28 17:28:20,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:28:20,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:20,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:28:20,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:28:20,537 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 8 states. [2019-11-28 17:28:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:20,662 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-11-28 17:28:20,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:28:20,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-28 17:28:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:20,666 INFO L225 Difference]: With dead ends: 37 [2019-11-28 17:28:20,666 INFO L226 Difference]: Without dead ends: 33 [2019-11-28 17:28:20,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:28:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-28 17:28:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-28 17:28:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-28 17:28:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2019-11-28 17:28:20,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 23 [2019-11-28 17:28:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:20,679 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2019-11-28 17:28:20,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:28:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2019-11-28 17:28:20,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-28 17:28:20,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:20,681 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:20,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:20,887 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:20,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1301134080, now seen corresponding path program 2 times [2019-11-28 17:28:20,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:20,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484807166] [2019-11-28 17:28:20,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 17:28:21,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484807166] [2019-11-28 17:28:21,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913034076] [2019-11-28 17:28:21,143 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:21,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:28:21,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:21,193 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:28:21,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 17:28:21,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:21,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-11-28 17:28:21,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126638013] [2019-11-28 17:28:21,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:28:21,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:28:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:28:21,286 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand 14 states. [2019-11-28 17:28:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:21,575 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2019-11-28 17:28:21,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:28:21,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-28 17:28:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:21,578 INFO L225 Difference]: With dead ends: 67 [2019-11-28 17:28:21,578 INFO L226 Difference]: Without dead ends: 34 [2019-11-28 17:28:21,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:28:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-28 17:28:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-28 17:28:21,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:28:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-11-28 17:28:21,589 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 36 [2019-11-28 17:28:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:21,590 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-11-28 17:28:21,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:28:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-11-28 17:28:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-28 17:28:21,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:21,593 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:21,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:21,803 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash 300559544, now seen corresponding path program 3 times [2019-11-28 17:28:21,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:21,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779395675] [2019-11-28 17:28:21,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:21,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-28 17:28:22,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779395675] [2019-11-28 17:28:22,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162350735] [2019-11-28 17:28:22,098 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:22,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 17:28:22,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:22,138 INFO L264 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:28:22,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:22,163 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-28 17:28:22,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:22,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2019-11-28 17:28:22,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272813100] [2019-11-28 17:28:22,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:28:22,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:28:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:28:22,166 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 12 states. [2019-11-28 17:28:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:22,319 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2019-11-28 17:28:22,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:28:22,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 64 [2019-11-28 17:28:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:22,326 INFO L225 Difference]: With dead ends: 76 [2019-11-28 17:28:22,327 INFO L226 Difference]: Without dead ends: 72 [2019-11-28 17:28:22,327 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:28:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-28 17:28:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-11-28 17:28:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-28 17:28:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2019-11-28 17:28:22,356 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 64 [2019-11-28 17:28:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:22,360 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2019-11-28 17:28:22,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:28:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2019-11-28 17:28:22,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-28 17:28:22,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:22,376 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:22,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:22,580 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2106103662, now seen corresponding path program 4 times [2019-11-28 17:28:22,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:22,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55870238] [2019-11-28 17:28:22,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:22,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:28:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-11-28 17:28:23,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55870238] [2019-11-28 17:28:23,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418837605] [2019-11-28 17:28:23,252 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:23,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:28:23,315 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:28:23,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:28:23,333 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:28:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 276 proven. 112 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-11-28 17:28:23,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:28:23,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 24 [2019-11-28 17:28:23,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103660286] [2019-11-28 17:28:23,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 17:28:23,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:28:23,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 17:28:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:28:23,490 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand 24 states. [2019-11-28 17:28:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:28:24,102 INFO L93 Difference]: Finished difference Result 139 states and 239 transitions. [2019-11-28 17:28:24,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:28:24,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-11-28 17:28:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:28:24,105 INFO L225 Difference]: With dead ends: 139 [2019-11-28 17:28:24,105 INFO L226 Difference]: Without dead ends: 57 [2019-11-28 17:28:24,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2019-11-28 17:28:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-28 17:28:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2019-11-28 17:28:24,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-28 17:28:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-11-28 17:28:24,117 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 146 [2019-11-28 17:28:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:28:24,117 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-11-28 17:28:24,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 17:28:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-11-28 17:28:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-28 17:28:24,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:28:24,120 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-28 17:28:24,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:28:24,332 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:28:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:28:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1483723059, now seen corresponding path program 5 times [2019-11-28 17:28:24,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:28:24,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828025733] [2019-11-28 17:28:24,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:28:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:28:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:28:24,385 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:28:24,386 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:28:24,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:28:24 BoogieIcfgContainer [2019-11-28 17:28:24,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:28:24,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:28:24,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:28:24,447 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:28:24,447 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:28:18" (3/4) ... [2019-11-28 17:28:24,451 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:28:24,530 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:28:24,530 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:28:24,533 INFO L168 Benchmark]: Toolchain (without parser) took 6242.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.3 MB). Free memory was 960.4 MB in the beginning and 925.3 MB in the end (delta: 35.1 MB). Peak memory consumption was 246.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,533 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:24,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.01 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,535 INFO L168 Benchmark]: Boogie Preprocessor took 17.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:28:24,535 INFO L168 Benchmark]: RCFGBuilder took 228.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,536 INFO L168 Benchmark]: TraceAbstraction took 5538.94 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 932.5 MB in the end (delta: 187.2 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,536 INFO L168 Benchmark]: Witness Printer took 84.34 ms. Allocated memory is still 1.2 GB. Free memory was 932.5 MB in the beginning and 925.3 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. [2019-11-28 17:28:24,539 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 275.01 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 84.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -194.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 228.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5538.94 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 63.4 MB). Free memory was 1.1 GB in the beginning and 932.5 MB in the end (delta: 187.2 MB). Peak memory consumption was 250.7 MB. Max. memory is 11.5 GB. * Witness Printer took 84.34 ms. Allocated memory is still 1.2 GB. Free memory was 932.5 MB in the beginning and 925.3 MB in the end (delta: 7.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 118 SDtfs, 245 SDslu, 395 SDs, 0 SdLazy, 891 SolverSat, 266 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 464 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 706 NumberOfCodeBlocks, 661 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 589 ConstructedInterpolants, 0 QuantifiedInterpolants, 104623 SizeOfPredicates, 19 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2220/2834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...