./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.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-simple/fibo_5-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7b71b458b3f08f188a62c7539b715f43fd7f97d .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:30,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:30,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:30,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:30,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:30,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:30,834 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:30,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:30,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:30,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:30,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:30,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:30,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:30,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:30,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:30,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:30,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:30,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:30,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:30,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:30,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:30,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:30,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:30,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:30,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:30,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:30,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:30,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:30,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:30,890 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:30,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:30,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:30,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:30,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:30,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:30,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:30,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:30,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:30,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:30,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:30,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:30,899 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:30,932 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:30,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:30,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:30,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:30,938 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:30,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:30,939 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:30,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:30,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:30,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:30,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:30,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:30,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:30,942 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:30,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:30,943 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:30,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:30,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:30,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:30,944 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:30,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:30,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:30,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:30,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:30,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:30,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:30,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:30,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:30,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:30,947 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 -> c7b71b458b3f08f188a62c7539b715f43fd7f97d [2019-11-28 17:29:31,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:31,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:31,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:31,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:31,294 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:31,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-28 17:29:31,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3991d1128/a84d972d23b443e984cdba5523e7d856/FLAG3f7033231 [2019-11-28 17:29:31,780 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:31,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2019-11-28 17:29:31,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3991d1128/a84d972d23b443e984cdba5523e7d856/FLAG3f7033231 [2019-11-28 17:29:32,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3991d1128/a84d972d23b443e984cdba5523e7d856 [2019-11-28 17:29:32,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:32,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:32,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:32,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:32,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:32,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af3dfac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32, skipping insertion in model container [2019-11-28 17:29:32,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:32,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:32,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:32,453 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:32,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:32,490 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:32,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32 WrapperNode [2019-11-28 17:29:32,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:32,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:32,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:32,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:32,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:32,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:32,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:32,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:32,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (1/1) ... [2019-11-28 17:29:32,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:32,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:32,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:32,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:32,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (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 17:29:32,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:32,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:32,679 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 17:29:32,680 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 17:29:32,847 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:32,847 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:32,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:32 BoogieIcfgContainer [2019-11-28 17:29:32,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:32,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:32,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:32,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:32,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:32" (1/3) ... [2019-11-28 17:29:32,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f9d9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:32, skipping insertion in model container [2019-11-28 17:29:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:32" (2/3) ... [2019-11-28 17:29:32,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f9d9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:32, skipping insertion in model container [2019-11-28 17:29:32,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:32" (3/3) ... [2019-11-28 17:29:32,857 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2019-11-28 17:29:32,882 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:32,890 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:32,915 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:32,956 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:32,956 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:32,956 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:32,957 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:32,957 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:32,957 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:32,957 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:32,958 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:32,980 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 17:29:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:32,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:32,987 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:32,987 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:32,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-28 17:29:33,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:33,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002726334] [2019-11-28 17:29:33,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,230 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 17:29:33,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002726334] [2019-11-28 17:29:33,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:33,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:33,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575863348] [2019-11-28 17:29:33,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:33,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:33,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:33,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:33,253 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-11-28 17:29:33,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:33,353 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-28 17:29:33,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:33,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:33,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:33,367 INFO L225 Difference]: With dead ends: 29 [2019-11-28 17:29:33,368 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:29:33,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 17:29:33,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:29:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:29:33,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:29:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 17:29:33,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-28 17:29:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:33,440 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 17:29:33,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 17:29:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:29:33,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:33,445 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:33,445 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:33,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-28 17:29:33,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:33,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572041070] [2019-11-28 17:29:33,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,558 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 17:29:33,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572041070] [2019-11-28 17:29:33,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:33,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:33,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7142921] [2019-11-28 17:29:33,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:33,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:33,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:33,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:33,565 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-11-28 17:29:33,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:33,631 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-28 17:29:33,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:33,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 17:29:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:33,633 INFO L225 Difference]: With dead ends: 23 [2019-11-28 17:29:33,633 INFO L226 Difference]: Without dead ends: 19 [2019-11-28 17:29:33,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 17:29:33,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-28 17:29:33,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-28 17:29:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:29:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-28 17:29:33,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-28 17:29:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:33,646 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-28 17:29:33,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-28 17:29:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-28 17:29:33,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:33,648 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 17:29:33,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:33,649 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-28 17:29:33,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:33,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404148935] [2019-11-28 17:29:33,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,803 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 17:29:33,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404148935] [2019-11-28 17:29:33,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689578733] [2019-11-28 17:29:33,804 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 17:29:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:33,846 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:33,853 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:33,913 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 17:29:33,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:33,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 17:29:33,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997659736] [2019-11-28 17:29:33,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:33,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:33,918 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 8 states. [2019-11-28 17:29:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:34,021 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-28 17:29:34,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:34,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-11-28 17:29:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:34,024 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:29:34,024 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:29:34,025 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 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 17:29:34,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:29:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-28 17:29:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-28 17:29:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-28 17:29:34,034 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-28 17:29:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:34,035 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-28 17:29:34,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-28 17:29:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:29:34,037 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:34,038 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 17:29:34,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:34,245 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:34,246 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-28 17:29:34,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:34,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86212] [2019-11-28 17:29:34,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,382 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 17:29:34,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86212] [2019-11-28 17:29:34,383 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982896484] [2019-11-28 17:29:34,384 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:34,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:34,439 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 17:29:34,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:34,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-28 17:29:34,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837427569] [2019-11-28 17:29:34,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:34,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:34,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:34,442 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 8 states. [2019-11-28 17:29:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:34,547 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-28 17:29:34,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:34,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-28 17:29:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:34,551 INFO L225 Difference]: With dead ends: 47 [2019-11-28 17:29:34,551 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 17:29:34,552 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 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 17:29:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 17:29:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-28 17:29:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-28 17:29:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-28 17:29:34,566 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-28 17:29:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:34,567 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-28 17:29:34,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:34,567 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-28 17:29:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 17:29:34,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:34,570 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:34,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:34,775 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:34,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-28 17:29:34,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:34,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427101235] [2019-11-28 17:29:34,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 17:29:34,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427101235] [2019-11-28 17:29:34,942 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144007280] [2019-11-28 17:29:34,942 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 17:29:34,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:34,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:34,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:35,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 17:29:35,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:35,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-11-28 17:29:35,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600591426] [2019-11-28 17:29:35,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:35,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:35,060 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 10 states. [2019-11-28 17:29:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:35,221 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-28 17:29:35,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:29:35,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2019-11-28 17:29:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:35,223 INFO L225 Difference]: With dead ends: 67 [2019-11-28 17:29:35,223 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:29:35,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:29:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-28 17:29:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-28 17:29:35,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-28 17:29:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:35,245 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-28 17:29:35,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-28 17:29:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 17:29:35,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:35,249 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:35,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:35,454 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:35,456 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-28 17:29:35,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:35,456 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426385981] [2019-11-28 17:29:35,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 17:29:35,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426385981] [2019-11-28 17:29:35,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14573535] [2019-11-28 17:29:35,632 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 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 17:29:35,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:35,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:35,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:35,677 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-28 17:29:35,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:35,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-11-28 17:29:35,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357841394] [2019-11-28 17:29:35,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:35,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:35,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:35,709 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 10 states. [2019-11-28 17:29:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:35,825 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-28 17:29:35,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:35,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-28 17:29:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:35,828 INFO L225 Difference]: With dead ends: 52 [2019-11-28 17:29:35,828 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 17:29:35,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 17:29:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-28 17:29:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-28 17:29:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-28 17:29:35,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-28 17:29:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:35,841 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-28 17:29:35,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-28 17:29:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:29:35,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:35,844 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:36,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:36,057 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:36,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:36,057 INFO L82 PathProgramCache]: Analyzing trace with hash -99212631, now seen corresponding path program 3 times [2019-11-28 17:29:36,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:36,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776887966] [2019-11-28 17:29:36,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-28 17:29:36,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776887966] [2019-11-28 17:29:36,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600313424] [2019-11-28 17:29:36,319 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 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 17:29:36,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 17:29:36,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:36,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:36,372 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 64 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-28 17:29:36,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:36,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2019-11-28 17:29:36,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792240667] [2019-11-28 17:29:36,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:29:36,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:29:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:29:36,437 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 15 states. [2019-11-28 17:29:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:36,783 INFO L93 Difference]: Finished difference Result 89 states and 139 transitions. [2019-11-28 17:29:36,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:29:36,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-28 17:29:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:36,787 INFO L225 Difference]: With dead ends: 89 [2019-11-28 17:29:36,787 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 17:29:36,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:29:36,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 17:29:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-28 17:29:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-28 17:29:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-28 17:29:36,799 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 63 [2019-11-28 17:29:36,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:36,800 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-28 17:29:36,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:29:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-28 17:29:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-28 17:29:36,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:36,803 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 17:29:37,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:37,008 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:37,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:37,009 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 4 times [2019-11-28 17:29:37,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:37,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362277718] [2019-11-28 17:29:37,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-28 17:29:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362277718] [2019-11-28 17:29:37,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929745238] [2019-11-28 17:29:37,535 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:37,603 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:29:37,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:37,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-28 17:29:37,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-11-28 17:29:37,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:37,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2019-11-28 17:29:37,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476159186] [2019-11-28 17:29:37,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:29:37,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:37,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:29:37,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:37,914 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 20 states. [2019-11-28 17:29:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:38,127 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2019-11-28 17:29:38,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 17:29:38,128 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-11-28 17:29:38,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:38,130 INFO L225 Difference]: With dead ends: 71 [2019-11-28 17:29:38,130 INFO L226 Difference]: Without dead ends: 67 [2019-11-28 17:29:38,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:29:38,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-28 17:29:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-11-28 17:29:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 17:29:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 81 transitions. [2019-11-28 17:29:38,143 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 81 transitions. Word has length 105 [2019-11-28 17:29:38,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:38,144 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 81 transitions. [2019-11-28 17:29:38,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:29:38,144 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 81 transitions. [2019-11-28 17:29:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-28 17:29:38,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:38,146 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 17:29:38,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:38,351 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:38,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1256539154, now seen corresponding path program 5 times [2019-11-28 17:29:38,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:38,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164701557] [2019-11-28 17:29:38,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:38,802 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 17:29:38,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164701557] [2019-11-28 17:29:38,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060627493] [2019-11-28 17:29:38,804 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:38,885 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-28 17:29:38,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:38,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:29:38,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:39,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 353 proven. 303 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2019-11-28 17:29:39,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:39,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 24 [2019-11-28 17:29:39,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051005530] [2019-11-28 17:29:39,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 17:29:39,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:39,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 17:29:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:29:39,042 INFO L87 Difference]: Start difference. First operand 56 states and 81 transitions. Second operand 24 states. [2019-11-28 17:29:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:39,618 INFO L93 Difference]: Finished difference Result 123 states and 212 transitions. [2019-11-28 17:29:39,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:29:39,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-11-28 17:29:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:39,621 INFO L225 Difference]: With dead ends: 123 [2019-11-28 17:29:39,621 INFO L226 Difference]: Without dead ends: 72 [2019-11-28 17:29:39,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:29:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-28 17:29:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2019-11-28 17:29:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-28 17:29:39,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-28 17:29:39,633 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 146 [2019-11-28 17:29:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:39,634 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-28 17:29:39,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 17:29:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-28 17:29:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-28 17:29:39,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:39,637 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:39,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:39,841 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 938070515, now seen corresponding path program 6 times [2019-11-28 17:29:39,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:39,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036186690] [2019-11-28 17:29:39,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 401 proven. 810 refuted. 0 times theorem prover too weak. 1369 trivial. 0 not checked. [2019-11-28 17:29:40,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036186690] [2019-11-28 17:29:40,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164723758] [2019-11-28 17:29:40,517 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:40,578 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-28 17:29:40,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:40,579 INFO L264 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:29:40,582 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 246 proven. 374 refuted. 0 times theorem prover too weak. 1960 trivial. 0 not checked. [2019-11-28 17:29:40,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:40,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 27 [2019-11-28 17:29:40,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095134262] [2019-11-28 17:29:40,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-28 17:29:40,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:40,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-28 17:29:40,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-11-28 17:29:40,697 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand 27 states. [2019-11-28 17:29:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:41,256 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-28 17:29:41,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-28 17:29:41,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 214 [2019-11-28 17:29:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:41,263 INFO L225 Difference]: With dead ends: 115 [2019-11-28 17:29:41,263 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:29:41,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2019-11-28 17:29:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:29:41,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:29:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:29:41,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:29:41,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 214 [2019-11-28 17:29:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:41,265 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:29:41,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-28 17:29:41,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:29:41,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:29:41,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:41,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:29:41,765 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-11-28 17:29:41,851 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:29:41,851 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:29:41,852 INFO L242 CegarLoopResult]: At program point L29(lines 23 30) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2019-11-28 17:29:41,852 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:29:41,852 INFO L246 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2019-11-28 17:29:41,852 INFO L246 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2019-11-28 17:29:41,852 INFO L242 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2019-11-28 17:29:41,853 INFO L246 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2019-11-28 17:29:41,853 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2019-11-28 17:29:41,853 INFO L246 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-28 17:29:41,853 INFO L246 CegarLoopResult]: For program point fiboEXIT(lines 5 13) no Hoare annotation was computed. [2019-11-28 17:29:41,853 INFO L246 CegarLoopResult]: For program point fiboFINAL(lines 5 13) no Hoare annotation was computed. [2019-11-28 17:29:41,854 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 5)) (= fibo_~n |fibo_#in~n|)) (or (not (<= |fibo_#in~n| 4)) (< 1 fibo_~n))) [2019-11-28 17:29:41,854 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 17:29:41,854 INFO L242 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (let ((.cse2 (= fibo_~n |fibo_#in~n|)) (.cse3 (<= |fibo_#t~ret0| 1)) (.cse4 (<= 1 |fibo_#t~ret0|)) (.cse5 (<= 3 fibo_~n))) (let ((.cse0 (<= |fibo_#in~n| 4)) (.cse1 (and .cse2 (<= fibo_~n 3) .cse3 .cse4 .cse5))) (and (or (not (<= |fibo_#in~n| 5)) (and (<= 3 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 3) (<= fibo_~n 5) (<= 5 fibo_~n)) .cse0) (or .cse1 (not (<= 3 |fibo_#in~n|)) (not (<= |fibo_#in~n| 3))) (or (not .cse0) .cse1 (and .cse2 .cse3 .cse4 (<= fibo_~n 2) (< 1 fibo_~n)) (and .cse2 (<= 2 |fibo_#t~ret0|) (<= |fibo_#t~ret0| 2) .cse5))))) [2019-11-28 17:29:41,854 INFO L246 CegarLoopResult]: For program point L8(lines 8 12) no Hoare annotation was computed. [2019-11-28 17:29:41,854 INFO L246 CegarLoopResult]: For program point L11-3(line 11) no Hoare annotation was computed. [2019-11-28 17:29:41,854 INFO L246 CegarLoopResult]: For program point L6(lines 6 12) no Hoare annotation was computed. [2019-11-28 17:29:41,855 INFO L249 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2019-11-28 17:29:41,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:29:41 BoogieIcfgContainer [2019-11-28 17:29:41,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:29:41,870 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:29:41,870 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:29:41,871 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:29:41,871 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:32" (3/4) ... [2019-11-28 17:29:41,874 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:29:41,879 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2019-11-28 17:29:41,883 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:29:41,883 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:29:41,925 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:29:41,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:29:41,927 INFO L168 Benchmark]: Toolchain (without parser) took 9717.05 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 286.3 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -241.9 MB). Peak memory consumption was 44.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:41,928 INFO L168 Benchmark]: CDTParser took 0.28 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 17:29:41,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.42 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 17:29:41,929 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.76 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:41,931 INFO L168 Benchmark]: Boogie Preprocessor took 84.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -151.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:41,932 INFO L168 Benchmark]: RCFGBuilder took 234.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:41,933 INFO L168 Benchmark]: TraceAbstraction took 9019.82 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 180.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -122.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:29:41,933 INFO L168 Benchmark]: Witness Printer took 55.37 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:29:41,937 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 280.42 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 36.76 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 84.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -151.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 234.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9019.82 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 180.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -122.2 MB). Peak memory consumption was 58.7 MB. Max. memory is 11.5 GB. * Witness Printer took 55.37 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 8.5s, OverallIterations: 10, TraceHistogramMax: 31, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, HoareTripleCheckerStatistics: 183 SDtfs, 419 SDslu, 822 SDs, 0 SdLazy, 1385 SolverSat, 417 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 992 GetRequests, 827 SyntacticMatches, 9 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, 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, 10 MinimizatonAttempts, 43 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 134 PreInvPairs, 157 NumberOfFragments, 125 HoareAnnotationTreeSize, 134 FomulaSimplifications, 185 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 312 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1309 NumberOfCodeBlocks, 1157 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1291 ConstructedInterpolants, 0 QuantifiedInterpolants, 365059 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1110 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 6820/9218 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 correct! Received shutdown request...