./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 0.1.24-6b5699a [2019-11-25 08:58:28,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:58:28,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:58:28,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:58:28,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:58:28,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:58:28,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:58:28,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:58:28,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:58:28,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:58:28,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:58:28,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:58:28,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:58:28,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:58:28,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:58:28,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:58:28,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:58:28,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:58:28,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:58:28,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:58:28,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:58:28,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:58:28,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:58:28,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:58:28,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:58:28,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:58:28,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:58:28,173 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:58:28,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:58:28,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:58:28,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:58:28,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:58:28,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:58:28,177 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:58:28,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:58:28,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:58:28,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:58:28,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:58:28,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:58:28,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:58:28,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:58:28,181 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:58:28,203 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:58:28,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:58:28,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:58:28,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:58:28,205 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:58:28,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:58:28,205 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:58:28,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:58:28,207 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:58:28,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:58:28,207 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:58:28,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:58:28,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:58:28,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:58:28,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:58:28,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:58:28,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:58:28,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:58:28,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:58:28,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:58:28,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:58:28,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:58:28,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:58:28,209 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_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 [2019-11-25 08:58:28,387 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:58:28,399 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:58:28,402 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:58:28,404 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:58:28,404 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:58:28,405 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-25 08:58:28,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/data/4669a8da0/70af38a9a4844fb1848a15121429ad11/FLAGd3dc1fe0f [2019-11-25 08:58:28,842 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:58:28,842 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-25 08:58:28,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/data/4669a8da0/70af38a9a4844fb1848a15121429ad11/FLAGd3dc1fe0f [2019-11-25 08:58:28,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/data/4669a8da0/70af38a9a4844fb1848a15121429ad11 [2019-11-25 08:58:28,860 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:58:28,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:58:28,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:28,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:58:28,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:58:28,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:28" (1/1) ... [2019-11-25 08:58:28,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764562e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:28, skipping insertion in model container [2019-11-25 08:58:28,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:58:28" (1/1) ... [2019-11-25 08:58:28,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:58:28,889 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:58:29,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:29,064 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:58:29,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:58:29,189 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:58:29,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29 WrapperNode [2019-11-25 08:58:29,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:58:29,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:29,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:58:29,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:58:29,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:58:29,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:58:29,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:58:29,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:58:29,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... [2019-11-25 08:58:29,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:58:29,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:58:29,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:58:29,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:58:29,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 08:58:29,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:58:29,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:58:29,290 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-25 08:58:29,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-25 08:58:29,455 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:58:29,455 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:58:29,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:29 BoogieIcfgContainer [2019-11-25 08:58:29,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:58:29,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:58:29,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:58:29,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:58:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:58:28" (1/3) ... [2019-11-25 08:58:29,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7324d39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:29, skipping insertion in model container [2019-11-25 08:58:29,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:58:29" (2/3) ... [2019-11-25 08:58:29,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7324d39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:58:29, skipping insertion in model container [2019-11-25 08:58:29,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:29" (3/3) ... [2019-11-25 08:58:29,464 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-11-25 08:58:29,473 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:58:29,479 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:58:29,492 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:58:29,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:58:29,545 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:58:29,545 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:58:29,546 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:58:29,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:58:29,546 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:58:29,546 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:58:29,546 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:58:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-25 08:58:29,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-25 08:58:29,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:29,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:29,583 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-25 08:58:29,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:29,613 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328890634] [2019-11-25 08:58:29,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:29,835 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 08:58:29,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328890634] [2019-11-25 08:58:29,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:29,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:58:29,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314618941] [2019-11-25 08:58:29,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:58:29,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:58:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:58:29,853 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-11-25 08:58:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:29,978 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-25 08:58:29,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:58:29,979 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-25 08:58:29,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:29,987 INFO L225 Difference]: With dead ends: 29 [2019-11-25 08:58:29,987 INFO L226 Difference]: Without dead ends: 17 [2019-11-25 08:58:29,990 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 [2019-11-25 08:58:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-25 08:58:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-25 08:58:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:58:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-25 08:58:30,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-25 08:58:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:30,029 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-25 08:58:30,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:58:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-25 08:58:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:58:30,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:30,031 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:30,031 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:30,031 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-25 08:58:30,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:30,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321919338] [2019-11-25 08:58:30,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,128 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 08:58:30,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321919338] [2019-11-25 08:58:30,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:58:30,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:58:30,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552835730] [2019-11-25 08:58:30,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:58:30,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:30,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:58:30,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:58:30,132 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-11-25 08:58:30,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:30,228 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-25 08:58:30,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:58:30,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-25 08:58:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:30,230 INFO L225 Difference]: With dead ends: 23 [2019-11-25 08:58:30,230 INFO L226 Difference]: Without dead ends: 19 [2019-11-25 08:58:30,231 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 [2019-11-25 08:58:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-25 08:58:30,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-25 08:58:30,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-25 08:58:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-25 08:58:30,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-25 08:58:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:30,237 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-25 08:58:30,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:58:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-25 08:58:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-25 08:58:30,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:30,238 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:30,239 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-25 08:58:30,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:30,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551336247] [2019-11-25 08:58:30,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-25 08:58:30,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551336247] [2019-11-25 08:58:30,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628340242] [2019-11-25 08:58:30,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 08:58:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:58:30,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-25 08:58:30,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:30,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-11-25 08:58:30,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469999669] [2019-11-25 08:58:30,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:58:30,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:58:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:30,503 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 10 states. [2019-11-25 08:58:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:30,601 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-25 08:58:30,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:58:30,601 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-25 08:58:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:30,603 INFO L225 Difference]: With dead ends: 41 [2019-11-25 08:58:30,603 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:58:30,604 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 [2019-11-25 08:58:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:58:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-25 08:58:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:58:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-25 08:58:30,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-25 08:58:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:30,615 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-25 08:58:30,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:58:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-25 08:58:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:58:30,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:30,619 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:30,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:30,820 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:30,821 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-25 08:58:30,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:30,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980086903] [2019-11-25 08:58:30,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:58:30,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980086903] [2019-11-25 08:58:30,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549659687] [2019-11-25 08:58:30,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 08:58:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:58:31,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-25 08:58:31,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:31,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-11-25 08:58:31,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345887262] [2019-11-25 08:58:31,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:58:31,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:31,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:58:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:58:31,033 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 10 states. [2019-11-25 08:58:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:31,194 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-25 08:58:31,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:58:31,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-25 08:58:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:31,197 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:58:31,197 INFO L226 Difference]: Without dead ends: 43 [2019-11-25 08:58:31,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:58:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-25 08:58:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-25 08:58:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-25 08:58:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-25 08:58:31,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-25 08:58:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:31,225 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-25 08:58:31,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:58:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-25 08:58:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-25 08:58:31,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:31,227 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:31,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:31,429 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-25 08:58:31,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:31,430 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392790116] [2019-11-25 08:58:31,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-25 08:58:31,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392790116] [2019-11-25 08:58:31,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831578480] [2019-11-25 08:58:31,604 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 08:58:31,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:58:31,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:31,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:58:31,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-25 08:58:31,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:31,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-25 08:58:31,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698410431] [2019-11-25 08:58:31,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:58:31,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:58:31,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:58:31,699 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 12 states. [2019-11-25 08:58:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:31,926 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-25 08:58:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:58:31,927 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-25 08:58:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:31,928 INFO L225 Difference]: With dead ends: 67 [2019-11-25 08:58:31,928 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:58:31,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:58:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:58:31,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-25 08:58:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:58:31,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-25 08:58:31,936 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-25 08:58:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:31,936 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-25 08:58:31,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:58:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-25 08:58:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-25 08:58:31,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:31,943 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:32,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:32,145 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-25 08:58:32,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:32,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964473528] [2019-11-25 08:58:32,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-25 08:58:32,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964473528] [2019-11-25 08:58:32,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373832332] [2019-11-25 08:58:32,324 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 08:58:32,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:58:32,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:32,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:58:32,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-25 08:58:32,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:32,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2019-11-25 08:58:32,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088866140] [2019-11-25 08:58:32,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:58:32,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:58:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:58:32,391 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 12 states. [2019-11-25 08:58:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:32,582 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-25 08:58:32,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:58:32,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-25 08:58:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:32,584 INFO L225 Difference]: With dead ends: 52 [2019-11-25 08:58:32,585 INFO L226 Difference]: Without dead ends: 48 [2019-11-25 08:58:32,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:58:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-25 08:58:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-25 08:58:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:58:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-25 08:58:32,618 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-25 08:58:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:32,619 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-25 08:58:32,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:58:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-25 08:58:32,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-25 08:58:32,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:32,625 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:32,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:32,829 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1133813247, now seen corresponding path program 3 times [2019-11-25 08:58:32,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:32,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136849451] [2019-11-25 08:58:32,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 73 proven. 128 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-11-25 08:58:33,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136849451] [2019-11-25 08:58:33,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208330099] [2019-11-25 08:58:33,104 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 [2019-11-25 08:58:33,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-25 08:58:33,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:33,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:58:33,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-25 08:58:33,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:33,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-25 08:58:33,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781561134] [2019-11-25 08:58:33,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:58:33,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:33,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:58:33,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:58:33,252 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 16 states. [2019-11-25 08:58:33,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:33,524 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-11-25 08:58:33,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:58:33,525 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2019-11-25 08:58:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:33,526 INFO L225 Difference]: With dead ends: 94 [2019-11-25 08:58:33,527 INFO L226 Difference]: Without dead ends: 54 [2019-11-25 08:58:33,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:58:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-25 08:58:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-25 08:58:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-25 08:58:33,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-11-25 08:58:33,550 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 89 [2019-11-25 08:58:33,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:33,551 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-11-25 08:58:33,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:58:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-11-25 08:58:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-25 08:58:33,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:33,559 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:33,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:33,763 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash -91709127, now seen corresponding path program 4 times [2019-11-25 08:58:33,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:33,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444893064] [2019-11-25 08:58:33,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-11-25 08:58:34,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444893064] [2019-11-25 08:58:34,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504529634] [2019-11-25 08:58:34,168 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 [2019-11-25 08:58:34,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:58:34,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:34,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:58:34,235 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-25 08:58:34,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:34,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 19 [2019-11-25 08:58:34,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445351754] [2019-11-25 08:58:34,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:58:34,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:58:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:58:34,310 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 19 states. [2019-11-25 08:58:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:34,687 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-11-25 08:58:34,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:58:34,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2019-11-25 08:58:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:34,690 INFO L225 Difference]: With dead ends: 93 [2019-11-25 08:58:34,690 INFO L226 Difference]: Without dead ends: 53 [2019-11-25 08:58:34,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:58:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-25 08:58:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-25 08:58:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-25 08:58:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-11-25 08:58:34,715 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 78 [2019-11-25 08:58:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:34,715 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-11-25 08:58:34,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:58:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-11-25 08:58:34,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-25 08:58:34,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:34,722 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:34,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:34,926 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:34,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2413653, now seen corresponding path program 5 times [2019-11-25 08:58:34,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:34,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962698470] [2019-11-25 08:58:34,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:58:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-25 08:58:35,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962698470] [2019-11-25 08:58:35,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36977061] [2019-11-25 08:58:35,348 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/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 [2019-11-25 08:58:35,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-25 08:58:35,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:58:35,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:58:35,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:58:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-11-25 08:58:35,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:58:35,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 24 [2019-11-25 08:58:35,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035181397] [2019-11-25 08:58:35,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-25 08:58:35,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:58:35,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-25 08:58:35,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:58:35,515 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 24 states. [2019-11-25 08:58:36,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:58:36,005 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-11-25 08:58:36,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:58:36,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 132 [2019-11-25 08:58:36,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:58:36,007 INFO L225 Difference]: With dead ends: 110 [2019-11-25 08:58:36,007 INFO L226 Difference]: Without dead ends: 69 [2019-11-25 08:58:36,009 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2019-11-25 08:58:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-25 08:58:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2019-11-25 08:58:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-25 08:58:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-25 08:58:36,021 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 132 [2019-11-25 08:58:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:58:36,022 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-25 08:58:36,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-25 08:58:36,022 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-25 08:58:36,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-25 08:58:36,023 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:58:36,023 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-25 08:58:36,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:58:36,224 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:58:36,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:58:36,224 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 6 times [2019-11-25 08:58:36,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:58:36,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774784809] [2019-11-25 08:58:36,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:58:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:58:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:58:36,273 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:58:36,273 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:58:36,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:58:36 BoogieIcfgContainer [2019-11-25 08:58:36,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:58:36,315 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:58:36,315 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:58:36,315 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:58:36,316 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:58:29" (3/4) ... [2019-11-25 08:58:36,318 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:58:36,376 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cabe8dba-9930-4401-ac34-64d871cd1c5c/bin/uautomizer/witness.graphml [2019-11-25 08:58:36,376 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:58:36,378 INFO L168 Benchmark]: Toolchain (without parser) took 7516.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 950.1 MB in the beginning and 924.0 MB in the end (delta: 26.1 MB). Peak memory consumption was 209.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:36,378 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:58:36,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:36,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.65 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 08:58:36,380 INFO L168 Benchmark]: Boogie Preprocessor took 18.41 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 08:58:36,380 INFO L168 Benchmark]: RCFGBuilder took 215.86 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:36,380 INFO L168 Benchmark]: TraceAbstraction took 6857.23 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 37.2 MB). Free memory was 1.1 GB in the beginning and 931.8 MB in the end (delta: 192.3 MB). Peak memory consumption was 229.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:36,381 INFO L168 Benchmark]: Witness Printer took 61.05 ms. Allocated memory is still 1.2 GB. Free memory was 931.8 MB in the beginning and 924.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:58:36,383 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -193.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.65 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 18.41 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 215.86 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6857.23 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 37.2 MB). Free memory was 1.1 GB in the beginning and 931.8 MB in the end (delta: 192.3 MB). Peak memory consumption was 229.6 MB. Max. memory is 11.5 GB. * Witness Printer took 61.05 ms. Allocated memory is still 1.2 GB. Free memory was 931.8 MB in the beginning and 924.0 MB in the end (delta: 7.8 MB). Peak memory consumption was 7.8 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: 6.7s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 322 SDslu, 549 SDs, 0 SdLazy, 1208 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 38 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s 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...