./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 12:48:55,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:48:55,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:48:55,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:48:55,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:48:55,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:48:55,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:48:55,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:48:55,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:48:55,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:48:55,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:48:55,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:48:55,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:48:55,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:48:55,210 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:48:55,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:48:55,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:48:55,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:48:55,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:48:55,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:48:55,216 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:48:55,217 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:48:55,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:48:55,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:48:55,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:48:55,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:48:55,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:48:55,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:48:55,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:48:55,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:48:55,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:48:55,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:48:55,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:48:55,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:48:55,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:48:55,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:48:55,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:48:55,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:48:55,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:48:55,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:48:55,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:48:55,225 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 12:48:55,235 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:48:55,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:48:55,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:48:55,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:48:55,236 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:48:55,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:48:55,236 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:48:55,236 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:48:55,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:48:55,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 12:48:55,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:48:55,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:48:55,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 12:48:55,239 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:48:55,239 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_61ed513c-9a52-4bce-a191-726547e36513/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-12-07 12:48:55,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:48:55,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:48:55,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:48:55,353 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:48:55,353 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:48:55,354 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-12-07 12:48:55,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/data/95d3510b6/1a4107735de8460c8e56aff17fcf8fff/FLAG9fbe570dd [2019-12-07 12:48:55,708 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:48:55,709 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-12-07 12:48:55,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/data/95d3510b6/1a4107735de8460c8e56aff17fcf8fff/FLAG9fbe570dd [2019-12-07 12:48:55,721 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/data/95d3510b6/1a4107735de8460c8e56aff17fcf8fff [2019-12-07 12:48:55,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:48:55,724 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:48:55,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:48:55,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:48:55,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:48:55,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9c5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55, skipping insertion in model container [2019-12-07 12:48:55,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:48:55,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:48:55,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:48:55,849 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:48:55,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:48:55,898 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:48:55,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55 WrapperNode [2019-12-07 12:48:55,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:48:55,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:48:55,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:48:55,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:48:55,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:48:55,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:48:55,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:48:55,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:48:55,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... [2019-12-07 12:48:55,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:48:55,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:48:55,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:48:55,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:48:55,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 [2019-12-07 12:48:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:48:55,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:48:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-12-07 12:48:55,969 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-12-07 12:48:56,060 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:48:56,061 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 12:48:56,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56 BoogieIcfgContainer [2019-12-07 12:48:56,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:48:56,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:48:56,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:48:56,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:48:56,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:48:55" (1/3) ... [2019-12-07 12:48:56,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700bf35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:56, skipping insertion in model container [2019-12-07 12:48:56,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:48:55" (2/3) ... [2019-12-07 12:48:56,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700bf35e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:48:56, skipping insertion in model container [2019-12-07 12:48:56,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56" (3/3) ... [2019-12-07 12:48:56,066 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-12-07 12:48:56,073 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:48:56,077 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 12:48:56,085 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 12:48:56,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:48:56,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 12:48:56,099 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:48:56,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:48:56,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:48:56,100 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:48:56,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:48:56,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:48:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 12:48:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 12:48:56,114 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:56,114 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:56,115 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:56,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-12-07 12:48:56,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:56,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153210570] [2019-12-07 12:48:56,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:48:56,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153210570] [2019-12-07 12:48:56,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:48:56,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 12:48:56,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782398481] [2019-12-07 12:48:56,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 12:48:56,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:56,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 12:48:56,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 12:48:56,272 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-12-07 12:48:56,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:56,346 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-12-07 12:48:56,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:48:56,348 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-12-07 12:48:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:56,354 INFO L225 Difference]: With dead ends: 29 [2019-12-07 12:48:56,354 INFO L226 Difference]: Without dead ends: 17 [2019-12-07 12:48:56,356 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:48:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-12-07 12:48:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-12-07 12:48:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 12:48:56,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 12:48:56,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-12-07 12:48:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:56,384 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 12:48:56,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 12:48:56,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 12:48:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 12:48:56,385 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:56,385 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:56,385 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-12-07 12:48:56,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:56,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571737624] [2019-12-07 12:48:56,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:48:56,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571737624] [2019-12-07 12:48:56,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:48:56,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 12:48:56,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612962584] [2019-12-07 12:48:56,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 12:48:56,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 12:48:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 12:48:56,432 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-12-07 12:48:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:56,474 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-12-07 12:48:56,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 12:48:56,474 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-12-07 12:48:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:56,475 INFO L225 Difference]: With dead ends: 23 [2019-12-07 12:48:56,475 INFO L226 Difference]: Without dead ends: 19 [2019-12-07 12:48:56,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:48:56,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-12-07 12:48:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-12-07 12:48:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-12-07 12:48:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-12-07 12:48:56,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-12-07 12:48:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:56,481 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-12-07 12:48:56,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 12:48:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-12-07 12:48:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 12:48:56,481 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:56,482 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:56,482 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-12-07 12:48:56,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:56,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565823900] [2019-12-07 12:48:56,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 12:48:56,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565823900] [2019-12-07 12:48:56,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287692652] [2019-12-07 12:48:56,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 [2019-12-07 12:48:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,587 INFO L264 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:48:56,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 12:48:56,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:56,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-12-07 12:48:56,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592564489] [2019-12-07 12:48:56,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:48:56,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:56,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:48:56,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:48:56,625 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 10 states. [2019-12-07 12:48:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:56,682 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-12-07 12:48:56,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:48:56,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-12-07 12:48:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:56,684 INFO L225 Difference]: With dead ends: 41 [2019-12-07 12:48:56,684 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 12:48:56,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:48:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 12:48:56,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-12-07 12:48:56,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 12:48:56,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-12-07 12:48:56,690 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-12-07 12:48:56,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:56,690 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-12-07 12:48:56,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:48:56,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-12-07 12:48:56,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 12:48:56,691 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:56,691 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:56,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:56,892 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:56,892 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-12-07 12:48:56,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:56,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835765332] [2019-12-07 12:48:56,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 12:48:56,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835765332] [2019-12-07 12:48:56,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080068339] [2019-12-07 12:48:56,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 [2019-12-07 12:48:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:56,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:48:56,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-07 12:48:56,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:56,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-12-07 12:48:56,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801093711] [2019-12-07 12:48:56,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:48:56,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:56,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:48:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:48:56,994 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 10 states. [2019-12-07 12:48:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:57,073 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-12-07 12:48:57,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:48:57,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-12-07 12:48:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:57,075 INFO L225 Difference]: With dead ends: 47 [2019-12-07 12:48:57,076 INFO L226 Difference]: Without dead ends: 43 [2019-12-07 12:48:57,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:48:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-07 12:48:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-12-07 12:48:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-07 12:48:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-12-07 12:48:57,087 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-12-07 12:48:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:57,088 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-12-07 12:48:57,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:48:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-12-07 12:48:57,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-07 12:48:57,090 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:57,090 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:57,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:57,291 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-12-07 12:48:57,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:57,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342343806] [2019-12-07 12:48:57,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-07 12:48:57,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342343806] [2019-12-07 12:48:57,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033170987] [2019-12-07 12:48:57,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 [2019-12-07 12:48:57,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:48:57,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:48:57,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:48:57,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-12-07 12:48:57,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:57,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-12-07 12:48:57,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761722774] [2019-12-07 12:48:57,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 12:48:57,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 12:48:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:48:57,468 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 12 states. [2019-12-07 12:48:57,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:57,584 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-12-07 12:48:57,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 12:48:57,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-12-07 12:48:57,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:57,585 INFO L225 Difference]: With dead ends: 67 [2019-12-07 12:48:57,585 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 12:48:57,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-12-07 12:48:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 12:48:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-12-07 12:48:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 12:48:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-12-07 12:48:57,593 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-12-07 12:48:57,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:57,593 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-12-07 12:48:57,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 12:48:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-12-07 12:48:57,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 12:48:57,594 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:57,595 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:57,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:57,796 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-12-07 12:48:57,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:57,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008629265] [2019-12-07 12:48:57,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 12:48:57,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008629265] [2019-12-07 12:48:57,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902782927] [2019-12-07 12:48:57,929 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/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 [2019-12-07 12:48:57,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:48:57,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:48:57,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:48:57,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-12-07 12:48:57,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:57,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2019-12-07 12:48:57,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49971637] [2019-12-07 12:48:57,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-07 12:48:57,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 12:48:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-12-07 12:48:57,968 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 12 states. [2019-12-07 12:48:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:58,061 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-12-07 12:48:58,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:48:58,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-12-07 12:48:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:58,063 INFO L225 Difference]: With dead ends: 52 [2019-12-07 12:48:58,063 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 12:48:58,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:48:58,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 12:48:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-12-07 12:48:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 12:48:58,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-12-07 12:48:58,071 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-12-07 12:48:58,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:58,071 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-12-07 12:48:58,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-07 12:48:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-12-07 12:48:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-12-07 12:48:58,074 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:58,074 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:58,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:58,276 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:58,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1133813247, now seen corresponding path program 3 times [2019-12-07 12:48:58,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:58,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685194543] [2019-12-07 12:48:58,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 73 proven. 128 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-12-07 12:48:58,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685194543] [2019-12-07 12:48:58,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280318570] [2019-12-07 12:48:58,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:58,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-07 12:48:58,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:48:58,544 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 12:48:58,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:58,591 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-12-07 12:48:58,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:58,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-12-07 12:48:58,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034816018] [2019-12-07 12:48:58,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-07 12:48:58,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:58,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-07 12:48:58,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:48:58,593 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 16 states. [2019-12-07 12:48:58,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:58,739 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-12-07 12:48:58,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-07 12:48:58,739 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2019-12-07 12:48:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:58,740 INFO L225 Difference]: With dead ends: 94 [2019-12-07 12:48:58,740 INFO L226 Difference]: Without dead ends: 54 [2019-12-07 12:48:58,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2019-12-07 12:48:58,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-07 12:48:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-12-07 12:48:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-07 12:48:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-12-07 12:48:58,748 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 89 [2019-12-07 12:48:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:58,748 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-12-07 12:48:58,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-07 12:48:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-12-07 12:48:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-12-07 12:48:58,749 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:58,749 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:58,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:58,950 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -91709127, now seen corresponding path program 4 times [2019-12-07 12:48:58,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:58,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596366145] [2019-12-07 12:48:58,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-12-07 12:48:59,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596366145] [2019-12-07 12:48:59,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166393865] [2019-12-07 12:48:59,140 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:59,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:48:59,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:48:59,166 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 12:48:59,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:48:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-12-07 12:48:59,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:48:59,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 19 [2019-12-07 12:48:59,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144426093] [2019-12-07 12:48:59,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-07 12:48:59,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:48:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-07 12:48:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-12-07 12:48:59,197 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 19 states. [2019-12-07 12:48:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:48:59,377 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-12-07 12:48:59,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 12:48:59,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2019-12-07 12:48:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:48:59,378 INFO L225 Difference]: With dead ends: 93 [2019-12-07 12:48:59,379 INFO L226 Difference]: Without dead ends: 53 [2019-12-07 12:48:59,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-12-07 12:48:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-07 12:48:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-12-07 12:48:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 12:48:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-12-07 12:48:59,385 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 78 [2019-12-07 12:48:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:48:59,385 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-12-07 12:48:59,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-07 12:48:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-12-07 12:48:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-12-07 12:48:59,387 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:48:59,387 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 12:48:59,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:59,588 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:48:59,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:48:59,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2413653, now seen corresponding path program 5 times [2019-12-07 12:48:59,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:48:59,590 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942353245] [2019-12-07 12:48:59,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:48:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:48:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-12-07 12:48:59,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942353245] [2019-12-07 12:48:59,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885267023] [2019-12-07 12:48:59,936 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:48:59,972 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-12-07 12:48:59,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:48:59,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 12:48:59,977 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:49:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-12-07 12:49:00,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:49:00,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 24 [2019-12-07 12:49:00,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340179556] [2019-12-07 12:49:00,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 12:49:00,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:49:00,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 12:49:00,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-12-07 12:49:00,033 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 24 states. [2019-12-07 12:49:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:49:00,284 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-12-07 12:49:00,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-07 12:49:00,285 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 132 [2019-12-07 12:49:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:49:00,286 INFO L225 Difference]: With dead ends: 110 [2019-12-07 12:49:00,286 INFO L226 Difference]: Without dead ends: 69 [2019-12-07 12:49:00,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2019-12-07 12:49:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-07 12:49:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2019-12-07 12:49:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-07 12:49:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-12-07 12:49:00,296 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 132 [2019-12-07 12:49:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:49:00,296 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-12-07 12:49:00,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 12:49:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-12-07 12:49:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-07 12:49:00,297 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:49:00,298 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-12-07 12:49:00,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:49:00,499 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:49:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:49:00,499 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 6 times [2019-12-07 12:49:00,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:49:00,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623306920] [2019-12-07 12:49:00,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:49:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:49:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 12:49:00,607 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 12:49:00,608 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 12:49:00,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:49:00 BoogieIcfgContainer [2019-12-07 12:49:00,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:49:00,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:49:00,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:49:00,668 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:49:00,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:48:56" (3/4) ... [2019-12-07 12:49:00,670 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 12:49:00,722 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_61ed513c-9a52-4bce-a191-726547e36513/bin/uautomizer/witness.graphml [2019-12-07 12:49:00,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:49:00,724 INFO L168 Benchmark]: Toolchain (without parser) took 4999.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.7 MB). Free memory was 943.5 MB in the beginning and 906.8 MB in the end (delta: 36.7 MB). Peak memory consumption was 192.4 MB. Max. memory is 11.5 GB. [2019-12-07 12:49:00,724 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:49:00,725 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:49:00,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:49:00,725 INFO L168 Benchmark]: Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:49:00,726 INFO L168 Benchmark]: RCFGBuilder took 132.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-12-07 12:49:00,726 INFO L168 Benchmark]: TraceAbstraction took 4605.80 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 50.3 MB). Free memory was 1.1 GB in the beginning and 908.9 MB in the end (delta: 173.7 MB). Peak memory consumption was 224.0 MB. Max. memory is 11.5 GB. [2019-12-07 12:49:00,726 INFO L168 Benchmark]: Witness Printer took 54.13 ms. Allocated memory is still 1.2 GB. Free memory was 908.9 MB in the beginning and 906.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:49:00,728 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 958.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 174.50 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 105.4 MB). Free memory was 943.5 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.27 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.23 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 132.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4605.80 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 50.3 MB). Free memory was 1.1 GB in the beginning and 908.9 MB in the end (delta: 173.7 MB). Peak memory consumption was 224.0 MB. Max. memory is 11.5 GB. * Witness Printer took 54.13 ms. Allocated memory is still 1.2 GB. Free memory was 908.9 MB in the beginning and 906.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.5s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 322 SDslu, 549 SDs, 0 SdLazy, 1208 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 38 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 956 NumberOfCodeBlocks, 875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 835 ConstructedInterpolants, 0 QuantifiedInterpolants, 141155 SizeOfPredicates, 31 NumberOfNonLiveVariables, 755 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2359/3498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...