./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer --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 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:53:13,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:53:13,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:53:13,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:53:13,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:53:13,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:53:13,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:53:13,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:53:13,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:53:13,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:53:13,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:53:13,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:53:13,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:53:13,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:53:13,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:53:13,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:53:13,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:53:13,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:53:13,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:53:13,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:53:13,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:53:13,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:53:13,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:53:13,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:53:13,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:53:13,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:53:13,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:53:13,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:53:13,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:53:13,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:53:13,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:53:13,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:53:13,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:53:13,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:53:13,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:53:13,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:53:13,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:53:13,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:53:13,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:53:13,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:53:13,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:53:13,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:53:13,103 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:53:13,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:53:13,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:53:13,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:53:13,114 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:53:13,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:53:13,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:53:13,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:53:13,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:53:13,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:53:13,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:53:13,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:53:13,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:53:13,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:53:13,116 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:53:13,117 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:53:13,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:53:13,118 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:53:13,118 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:53:13,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:53:13,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:53:13,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:53:13,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:53:13,118 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer 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 -> 05dc78db4ae9adf9f9f4e8e18548ea9c0db83e87 [2019-11-25 08:53:13,285 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:53:13,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:53:13,297 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:53:13,298 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:53:13,299 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:53:13,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-11-25 08:53:13,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/data/92118b2ab/d2ee198eca2c47f0a84afa95b3c524ff/FLAGb79ec79a4 [2019-11-25 08:53:13,711 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:53:13,712 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/sv-benchmarks/c/recursive-simple/fibo_2calls_2-2.c [2019-11-25 08:53:13,716 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/data/92118b2ab/d2ee198eca2c47f0a84afa95b3c524ff/FLAGb79ec79a4 [2019-11-25 08:53:14,164 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/data/92118b2ab/d2ee198eca2c47f0a84afa95b3c524ff [2019-11-25 08:53:14,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:53:14,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:53:14,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:14,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:53:14,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:53:14,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264296e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14, skipping insertion in model container [2019-11-25 08:53:14,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:53:14,194 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:53:14,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:14,334 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:53:14,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:53:14,416 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:53:14,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14 WrapperNode [2019-11-25 08:53:14,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:53:14,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:14,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:53:14,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:53:14,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:53:14,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:53:14,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:53:14,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:53:14,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... [2019-11-25 08:53:14,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:53:14,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:53:14,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:53:14,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:53:14,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/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 [2019-11-25 08:53:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:53:14,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:53:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-25 08:53:14,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-25 08:53:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-25 08:53:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-25 08:53:14,700 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:53:14,701 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:53:14,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:14 BoogieIcfgContainer [2019-11-25 08:53:14,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:53:14,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:53:14,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:53:14,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:53:14,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:53:14" (1/3) ... [2019-11-25 08:53:14,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad9cfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:14, skipping insertion in model container [2019-11-25 08:53:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:53:14" (2/3) ... [2019-11-25 08:53:14,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ad9cfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:53:14, skipping insertion in model container [2019-11-25 08:53:14,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:14" (3/3) ... [2019-11-25 08:53:14,730 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2019-11-25 08:53:14,738 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:53:14,762 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:53:14,771 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:53:14,807 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:53:14,807 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:53:14,807 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:53:14,807 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:53:14,807 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:53:14,808 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:53:14,808 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:53:14,808 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:53:14,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:53:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:53:14,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:14,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:14,828 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:14,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-25 08:53:14,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:14,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955671688] [2019-11-25 08:53:14,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:14,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:14,996 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955671688] [2019-11-25 08:53:14,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:14,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:53:14,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287841011] [2019-11-25 08:53:15,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:15,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:15,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:15,012 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-11-25 08:53:15,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:15,121 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-25 08:53:15,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:15,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-25 08:53:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:15,130 INFO L225 Difference]: With dead ends: 38 [2019-11-25 08:53:15,130 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:53:15,133 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 [2019-11-25 08:53:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:53:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:53:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:53:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:53:15,168 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-25 08:53:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:15,168 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:53:15,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:53:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:53:15,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:15,170 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:15,170 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-25 08:53:15,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:15,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997932928] [2019-11-25 08:53:15,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:15,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997932928] [2019-11-25 08:53:15,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:53:15,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:53:15,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695535284] [2019-11-25 08:53:15,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:53:15,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:15,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:53:15,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:53:15,217 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-25 08:53:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:15,297 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-25 08:53:15,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:53:15,298 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-25 08:53:15,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:15,300 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:53:15,300 INFO L226 Difference]: Without dead ends: 28 [2019-11-25 08:53:15,301 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 [2019-11-25 08:53:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-25 08:53:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-25 08:53:15,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:53:15,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-25 08:53:15,307 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-25 08:53:15,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:15,308 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-25 08:53:15,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:53:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-25 08:53:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:53:15,310 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:15,310 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:15,310 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:15,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-25 08:53:15,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:15,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985928194] [2019-11-25 08:53:15,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:15,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985928194] [2019-11-25 08:53:15,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038780208] [2019-11-25 08:53:15,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/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 [2019-11-25 08:53:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:53:15,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:15,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:15,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-25 08:53:15,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819559898] [2019-11-25 08:53:15,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:53:15,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:53:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:53:15,528 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-11-25 08:53:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:15,625 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2019-11-25 08:53:15,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:53:15,626 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-25 08:53:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:15,627 INFO L225 Difference]: With dead ends: 54 [2019-11-25 08:53:15,627 INFO L226 Difference]: Without dead ends: 30 [2019-11-25 08:53:15,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:53:15,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-25 08:53:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-25 08:53:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:53:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-25 08:53:15,644 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 22 [2019-11-25 08:53:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:15,645 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-25 08:53:15,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:53:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-25 08:53:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:53:15,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:15,648 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:15,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:15,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-25 08:53:15,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:15,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846742457] [2019-11-25 08:53:15,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:53:16,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846742457] [2019-11-25 08:53:16,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075746021] [2019-11-25 08:53:16,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/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 [2019-11-25 08:53:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-25 08:53:16,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:53:16,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:16,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-25 08:53:16,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423390464] [2019-11-25 08:53:16,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:53:16,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:16,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:53:16,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:16,195 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 10 states. [2019-11-25 08:53:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:16,247 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2019-11-25 08:53:16,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:53:16,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:53:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:16,250 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:53:16,250 INFO L226 Difference]: Without dead ends: 38 [2019-11-25 08:53:16,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:53:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-25 08:53:16,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-11-25 08:53:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:53:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-25 08:53:16,259 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 23 [2019-11-25 08:53:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:16,260 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-25 08:53:16,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:53:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-25 08:53:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-25 08:53:16,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:16,262 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:53:16,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:16,472 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:16,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:16,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1239842987, now seen corresponding path program 1 times [2019-11-25 08:53:16,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:16,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670376840] [2019-11-25 08:53:16,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:53:16,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670376840] [2019-11-25 08:53:16,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470670193] [2019-11-25 08:53:16,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/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 [2019-11-25 08:53:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:16,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:53:16,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:53:16,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:53:16,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2019-11-25 08:53:16,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011433863] [2019-11-25 08:53:16,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:53:16,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:16,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:53:16,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:53:16,682 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 7 states. [2019-11-25 08:53:16,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:16,813 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2019-11-25 08:53:16,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:53:16,814 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-25 08:53:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:16,815 INFO L225 Difference]: With dead ends: 40 [2019-11-25 08:53:16,815 INFO L226 Difference]: Without dead ends: 36 [2019-11-25 08:53:16,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:53:16,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-25 08:53:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-25 08:53:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-25 08:53:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2019-11-25 08:53:16,830 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 24 [2019-11-25 08:53:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:16,830 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2019-11-25 08:53:16,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:53:16,837 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2019-11-25 08:53:16,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:53:16,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:16,840 INFO L410 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] [2019-11-25 08:53:17,043 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:17,043 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-25 08:53:17,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:17,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323518095] [2019-11-25 08:53:17,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:53:17,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323518095] [2019-11-25 08:53:17,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339315813] [2019-11-25 08:53:17,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/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 [2019-11-25 08:53:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:17,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:53:17,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-25 08:53:17,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:17,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2019-11-25 08:53:17,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269318701] [2019-11-25 08:53:17,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:53:17,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:17,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:53:17,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:53:17,355 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 15 states. [2019-11-25 08:53:17,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:17,688 INFO L93 Difference]: Finished difference Result 65 states and 96 transitions. [2019-11-25 08:53:17,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:53:17,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2019-11-25 08:53:17,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:17,689 INFO L225 Difference]: With dead ends: 65 [2019-11-25 08:53:17,689 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:53:17,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:53:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:53:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:53:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:53:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:53:17,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-11-25 08:53:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:17,691 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:53:17,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:53:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:53:17,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:53:17,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:17,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:53:18,025 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:53:18,025 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:53:18,025 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:53:18,025 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-25 08:53:18,025 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 2 ULTIMATE.start_main_~x~0) [2019-11-25 08:53:18,025 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-25 08:53:18,026 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:53:18,026 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 2) (<= 2 ULTIMATE.start_main_~x~0)) [2019-11-25 08:53:18,026 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-25 08:53:18,026 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-25 08:53:18,026 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-25 08:53:18,026 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= 2 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2019-11-25 08:53:18,026 INFO L444 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L440 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (<= 2 |fibo2_#in~n|) (= fibo2_~n |fibo2_#in~n|)) [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-25 08:53:18,027 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-25 08:53:18,027 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2019-11-25 08:53:18,027 INFO L444 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-25 08:53:18,028 INFO L440 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#in~n|) .cse0) (and (<= 1 |fibo1_#t~ret0|) (< 1 fibo1_~n) (<= |fibo1_#t~ret0| 1) .cse0))) [2019-11-25 08:53:18,028 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:53:18,028 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-25 08:53:18,028 INFO L444 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-11-25 08:53:18,028 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-25 08:53:18,028 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-25 08:53:18,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:53:18 BoogieIcfgContainer [2019-11-25 08:53:18,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:53:18,042 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:53:18,042 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:53:18,042 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:53:18,043 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:53:14" (3/4) ... [2019-11-25 08:53:18,046 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:53:18,052 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-25 08:53:18,052 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-25 08:53:18,057 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:53:18,057 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-25 08:53:18,101 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1eb1b4de-fca0-4ca7-8d27-eefdb5a0eaa2/bin/uautomizer/witness.graphml [2019-11-25 08:53:18,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:53:18,103 INFO L168 Benchmark]: Toolchain (without parser) took 3935.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -182.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:18,103 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:18,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:18,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:18,105 INFO L168 Benchmark]: Boogie Preprocessor took 14.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:18,105 INFO L168 Benchmark]: RCFGBuilder took 241.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:18,106 INFO L168 Benchmark]: TraceAbstraction took 3332.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -9.3 MB). Peak memory consumption was 246.9 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:18,106 INFO L168 Benchmark]: Witness Printer took 59.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:18,109 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 248.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.3 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -197.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.43 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.34 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 241.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3332.09 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -9.3 MB). Peak memory consumption was 246.9 MB. Max. memory is 11.5 GB. * Witness Printer took 59.57 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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: 35]: Loop Invariant Derived loop invariant: 2 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 154 SDtfs, 84 SDslu, 631 SDs, 0 SdLazy, 452 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 54 HoareAnnotationTreeSize, 47 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 30 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 217 ConstructedInterpolants, 0 QuantifiedInterpolants, 12299 SizeOfPredicates, 9 NumberOfNonLiveVariables, 239 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 39/58 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...