./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.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_2calls_2-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 557a695617b4e9b94623290cf2a16a969b4f7de0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:47:04,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:47:04,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:47:04,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:47:04,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:47:04,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:47:04,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:47:04,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:47:04,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:47:04,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:47:04,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:47:04,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:47:04,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:47:04,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:47:04,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:47:04,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:47:04,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:47:04,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:47:04,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:47:04,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:47:04,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:47:04,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:47:04,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:47:04,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:47:04,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:47:04,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:47:04,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:47:04,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:47:04,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:47:04,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:47:04,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:47:04,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:47:04,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:47:04,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:47:04,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:47:04,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:47:04,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:47:04,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:47:04,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:47:04,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:47:04,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:47:04,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:47:04,866 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:47:04,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:47:04,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:47:04,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:47:04,868 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:47:04,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:47:04,869 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:47:04,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:47:04,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:47:04,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:47:04,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:47:04,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:47:04,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:47:04,872 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:47:04,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:47:04,872 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:47:04,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:47:04,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:47:04,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:47:04,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:47:04,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:47:04,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:47:04,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:47:04,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:47:04,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:47:04,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:47:04,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:47:04,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:47:04,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:47:04,877 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(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 557a695617b4e9b94623290cf2a16a969b4f7de0 [2020-10-20 01:47:05,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:47:05,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:47:05,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:47:05,103 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:47:05,104 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:47:05,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2020-10-20 01:47:05,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678d8eb1b/2fba4988dee544eb94e2de6df0a27a9f/FLAGea874b681 [2020-10-20 01:47:05,665 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:47:05,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2020-10-20 01:47:05,673 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678d8eb1b/2fba4988dee544eb94e2de6df0a27a9f/FLAGea874b681 [2020-10-20 01:47:06,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/678d8eb1b/2fba4988dee544eb94e2de6df0a27a9f [2020-10-20 01:47:06,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:47:06,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:47:06,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:06,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:47:06,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:47:06,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e0aab55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06, skipping insertion in model container [2020-10-20 01:47:06,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:47:06,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:47:06,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:06,403 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:47:06,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:47:06,435 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:47:06,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06 WrapperNode [2020-10-20 01:47:06,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:47:06,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:06,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:47:06,438 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:47:06,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,454 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:47:06,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:47:06,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:47:06,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:47:06,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (1/1) ... [2020-10-20 01:47:06,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:47:06,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:47:06,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:47:06,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:47:06,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (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 [2020-10-20 01:47:06,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:47:06,549 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 01:47:06,549 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 01:47:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:47:06,550 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 01:47:06,551 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 01:47:06,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:47:06,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:47:06,818 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:47:06,818 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:47:06,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:06 BoogieIcfgContainer [2020-10-20 01:47:06,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:47:06,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:47:06,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:47:06,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:47:06,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:47:06" (1/3) ... [2020-10-20 01:47:06,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce6c6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:06, skipping insertion in model container [2020-10-20 01:47:06,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:47:06" (2/3) ... [2020-10-20 01:47:06,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce6c6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:47:06, skipping insertion in model container [2020-10-20 01:47:06,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:06" (3/3) ... [2020-10-20 01:47:06,834 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-10-20 01:47:06,852 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:47:06,866 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:47:06,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:47:06,920 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:47:06,921 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:47:06,921 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:47:06,922 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:47:06,922 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:47:06,922 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:47:06,922 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:47:06,923 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:47:06,949 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-20 01:47:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:47:06,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:06,959 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:06,960 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:06,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-10-20 01:47:06,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:06,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204935415] [2020-10-20 01:47:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:47:07,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204935415] [2020-10-20 01:47:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:07,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799907239] [2020-10-20 01:47:07,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:07,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:07,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:07,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:07,264 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-10-20 01:47:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:07,371 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-20 01:47:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:07,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:47:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:07,388 INFO L225 Difference]: With dead ends: 40 [2020-10-20 01:47:07,389 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 01:47:07,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:47:07,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 01:47:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 01:47:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:07,456 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-10-20 01:47:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:07,457 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:07,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:47:07,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:07,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:07,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:47:07,462 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-10-20 01:47:07,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:07,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722149000] [2020-10-20 01:47:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:47:07,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722149000] [2020-10-20 01:47:07,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:47:07,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:47:07,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136956008] [2020-10-20 01:47:07,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:47:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:47:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:47:07,548 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-10-20 01:47:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:07,677 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-20 01:47:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:47:07,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 01:47:07,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:07,682 INFO L225 Difference]: With dead ends: 33 [2020-10-20 01:47:07,684 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 01:47:07,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 01:47:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 01:47:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-20 01:47:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 01:47:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 01:47:07,708 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-10-20 01:47:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:07,709 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 01:47:07,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:47:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-10-20 01:47:07,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 01:47:07,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:07,715 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:07,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:47:07,716 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-10-20 01:47:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:07,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990033686] [2020-10-20 01:47:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:07,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990033686] [2020-10-20 01:47:07,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361709353] [2020-10-20 01:47:07,907 INFO L95 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 [2020-10-20 01:47:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:08,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:08,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-20 01:47:08,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719382928] [2020-10-20 01:47:08,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 01:47:08,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:08,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 01:47:08,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:08,140 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 11 states. [2020-10-20 01:47:08,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:08,354 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-20 01:47:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 01:47:08,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-20 01:47:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:08,357 INFO L225 Difference]: With dead ends: 55 [2020-10-20 01:47:08,357 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 01:47:08,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:47:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 01:47:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-20 01:47:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 01:47:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-20 01:47:08,368 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-10-20 01:47:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:08,368 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 01:47:08,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 01:47:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-10-20 01:47:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:47:08,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:08,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:08,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:47:08,585 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-10-20 01:47:08,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:08,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728073246] [2020-10-20 01:47:08,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:08,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:08,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:47:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728073246] [2020-10-20 01:47:08,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654354436] [2020-10-20 01:47:08,762 INFO L95 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 [2020-10-20 01:47:08,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:08,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 01:47:08,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:47:08,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:08,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 01:47:08,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368295921] [2020-10-20 01:47:08,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:47:08,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:08,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:47:08,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:47:08,877 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 10 states. [2020-10-20 01:47:08,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:08,946 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-10-20 01:47:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:47:08,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-20 01:47:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:08,949 INFO L225 Difference]: With dead ends: 43 [2020-10-20 01:47:08,949 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 01:47:08,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:47:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 01:47:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-20 01:47:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 01:47:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-20 01:47:08,959 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 24 [2020-10-20 01:47:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:08,959 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-20 01:47:08,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:47:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-20 01:47:08,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-20 01:47:08,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:08,961 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:09,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:09,167 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:09,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:09,167 INFO L82 PathProgramCache]: Analyzing trace with hash 697382345, now seen corresponding path program 1 times [2020-10-20 01:47:09,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:09,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407765788] [2020-10-20 01:47:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:09,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 01:47:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:47:09,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407765788] [2020-10-20 01:47:09,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795815749] [2020-10-20 01:47:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 01:47:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 01:47:09,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:47:09,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2020-10-20 01:47:09,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723779449] [2020-10-20 01:47:09,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:47:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:09,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:47:09,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:47:09,411 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 7 states. [2020-10-20 01:47:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:09,524 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-10-20 01:47:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:47:09,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-20 01:47:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:09,527 INFO L225 Difference]: With dead ends: 41 [2020-10-20 01:47:09,527 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 01:47:09,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 01:47:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-20 01:47:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 01:47:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-10-20 01:47:09,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 25 [2020-10-20 01:47:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:09,535 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-10-20 01:47:09,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:47:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-10-20 01:47:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-20 01:47:09,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:47:09,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:47:09,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:09,751 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:47:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:47:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-10-20 01:47:09,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:47:09,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697176780] [2020-10-20 01:47:09,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:47:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:47:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 01:47:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 01:47:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 01:47:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 01:47:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697176780] [2020-10-20 01:47:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498646299] [2020-10-20 01:47:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-20 01:47:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:47:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:47:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:47:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:47:10,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:47:10,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-10-20 01:47:10,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995511590] [2020-10-20 01:47:10,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-20 01:47:10,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:47:10,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-20 01:47:10,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-20 01:47:10,069 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 13 states. [2020-10-20 01:47:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:47:10,253 INFO L93 Difference]: Finished difference Result 66 states and 98 transitions. [2020-10-20 01:47:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 01:47:10,254 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-10-20 01:47:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:47:10,254 INFO L225 Difference]: With dead ends: 66 [2020-10-20 01:47:10,255 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:47:10,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-20 01:47:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:47:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:47:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:47:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:47:10,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-10-20 01:47:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:47:10,258 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:47:10,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-20 01:47:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:47:10,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:47:10,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:47:10,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:47:10,594 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:47:10,594 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:47:10,594 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:47:10,594 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:47:10,594 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-20 01:47:10,594 INFO L270 CegarLoopResult]: At program point L43(lines 37 44) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2020-10-20 01:47:10,595 INFO L274 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-10-20 01:47:10,595 INFO L274 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-10-20 01:47:10,595 INFO L270 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (= ULTIMATE.start_main_~x~0 2) [2020-10-20 01:47:10,595 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-20 01:47:10,595 INFO L274 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-10-20 01:47:10,595 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-20 01:47:10,595 INFO L277 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-10-20 01:47:10,595 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L270 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L274 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-10-20 01:47:10,596 INFO L277 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-10-20 01:47:10,597 INFO L270 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-10-20 01:47:10,597 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-20 01:47:10,597 INFO L270 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 1 |fibo1_#t~ret7|) (< 1 fibo1_~n) (<= |fibo1_#t~ret7| 1) .cse0) (and .cse0 (<= 3 |fibo1_#in~n|)))) [2020-10-20 01:47:10,597 INFO L274 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-10-20 01:47:10,597 INFO L274 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-10-20 01:47:10,597 INFO L274 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-10-20 01:47:10,597 INFO L274 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-10-20 01:47:10,598 INFO L274 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-10-20 01:47:10,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:47:10 BoogieIcfgContainer [2020-10-20 01:47:10,614 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:47:10,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:47:10,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:47:10,615 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:47:10,615 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:47:06" (3/4) ... [2020-10-20 01:47:10,618 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:47:10,624 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2020-10-20 01:47:10,624 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2020-10-20 01:47:10,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 01:47:10,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:47:10,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:47:10,629 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:47:10,683 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:47:10,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:47:10,686 INFO L168 Benchmark]: Toolchain (without parser) took 4623.20 ms. Allocated memory was 34.6 MB in the beginning and 61.9 MB in the end (delta: 27.3 MB). Free memory was 7.7 MB in the beginning and 35.8 MB in the end (delta: -28.1 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 01:47:10,687 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 34.6 MB. Free memory was 12.6 MB in the beginning and 12.6 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,688 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.43 ms. Allocated memory was 37.7 MB in the beginning and 45.1 MB in the end (delta: 7.3 MB). Free memory was 21.3 MB in the beginning and 27.2 MB in the end (delta: -5.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,688 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 45.1 MB. Free memory was 27.2 MB in the beginning and 25.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,689 INFO L168 Benchmark]: Boogie Preprocessor took 18.56 ms. Allocated memory is still 45.1 MB. Free memory was 25.6 MB in the beginning and 24.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,690 INFO L168 Benchmark]: RCFGBuilder took 331.46 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 24.4 MB in the beginning and 25.4 MB in the end (delta: -963.4 kB). Peak memory consumption was 14.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,691 INFO L168 Benchmark]: TraceAbstraction took 3789.57 ms. Allocated memory was 47.7 MB in the beginning and 61.9 MB in the end (delta: 14.2 MB). Free memory was 24.9 MB in the beginning and 39.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,691 INFO L168 Benchmark]: Witness Printer took 69.19 ms. Allocated memory is still 61.9 MB. Free memory was 39.2 MB in the beginning and 35.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:47:10,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 34.6 MB. Free memory was 12.6 MB in the beginning and 12.6 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 358.43 ms. Allocated memory was 37.7 MB in the beginning and 45.1 MB in the end (delta: 7.3 MB). Free memory was 21.3 MB in the beginning and 27.2 MB in the end (delta: -5.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 34.30 ms. Allocated memory is still 45.1 MB. Free memory was 27.2 MB in the beginning and 25.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 18.56 ms. Allocated memory is still 45.1 MB. Free memory was 25.6 MB in the beginning and 24.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 331.46 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 24.4 MB in the beginning and 25.4 MB in the end (delta: -963.4 kB). Peak memory consumption was 14.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3789.57 ms. Allocated memory was 47.7 MB in the beginning and 61.9 MB in the end (delta: 14.2 MB). Free memory was 24.9 MB in the beginning and 39.2 MB in the end (delta: -14.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 14.3 GB. * Witness Printer took 69.19 ms. Allocated memory is still 61.9 MB. Free memory was 39.2 MB in the beginning and 35.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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: 37]: Loop Invariant Derived loop invariant: x == 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.5s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 149 SDtfs, 97 SDslu, 685 SDs, 0 SdLazy, 486 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 190 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 47 PreInvPairs, 57 NumberOfFragments, 50 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 237 NumberOfCodeBlocks, 237 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 227 ConstructedInterpolants, 0 QuantifiedInterpolants, 12941 SizeOfPredicates, 10 NumberOfNonLiveVariables, 355 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 35/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...