./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 fe571d33601eb001defa960d70b02ea99b59263c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-678e011 [2019-11-20 02:29:03,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 02:29:03,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 02:29:03,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 02:29:03,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 02:29:03,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 02:29:03,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 02:29:03,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 02:29:03,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 02:29:03,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 02:29:03,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 02:29:03,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 02:29:03,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 02:29:03,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 02:29:03,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 02:29:03,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 02:29:03,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 02:29:03,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 02:29:03,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 02:29:03,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 02:29:03,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 02:29:03,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 02:29:03,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 02:29:03,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 02:29:03,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 02:29:03,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 02:29:03,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 02:29:03,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 02:29:03,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 02:29:03,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 02:29:03,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 02:29:03,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 02:29:03,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 02:29:03,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 02:29:03,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 02:29:03,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 02:29:03,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 02:29:03,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 02:29:03,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 02:29:03,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 02:29:03,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 02:29:03,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 02:29:03,375 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 02:29:03,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 02:29:03,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 02:29:03,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 02:29:03,377 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 02:29:03,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 02:29:03,377 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 02:29:03,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 02:29:03,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 02:29:03,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 02:29:03,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 02:29:03,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 02:29:03,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 02:29:03,379 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 02:29:03,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 02:29:03,379 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 02:29:03,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 02:29:03,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 02:29:03,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 02:29:03,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 02:29:03,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 02:29:03,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 02:29:03,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 02:29:03,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 02:29:03,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 02:29:03,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 02:29:03,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 02:29:03,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 02:29:03,382 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_e5e0fe7f-6da5-47e7-b545-10120983c551/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 -> fe571d33601eb001defa960d70b02ea99b59263c [2019-11-20 02:29:03,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 02:29:03,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 02:29:03,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 02:29:03,543 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 02:29:03,543 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 02:29:03,544 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-20 02:29:03,596 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/data/a5afc2b68/90f121f0c6764791abd2e23a2765ac1e/FLAG4906cacee [2019-11-20 02:29:03,929 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 02:29:03,929 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/sv-benchmarks/c/recursive-simple/fibo_2calls_5-2.c [2019-11-20 02:29:03,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/data/a5afc2b68/90f121f0c6764791abd2e23a2765ac1e/FLAG4906cacee [2019-11-20 02:29:04,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/data/a5afc2b68/90f121f0c6764791abd2e23a2765ac1e [2019-11-20 02:29:04,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 02:29:04,328 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 02:29:04,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 02:29:04,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 02:29:04,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 02:29:04,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,337 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e0ff54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04, skipping insertion in model container [2019-11-20 02:29:04,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,343 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 02:29:04,357 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 02:29:04,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:29:04,496 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 02:29:04,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 02:29:04,584 INFO L192 MainTranslator]: Completed translation [2019-11-20 02:29:04,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04 WrapperNode [2019-11-20 02:29:04,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 02:29:04,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 02:29:04,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 02:29:04,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 02:29:04,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 02:29:04,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 02:29:04,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 02:29:04,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 02:29:04,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... [2019-11-20 02:29:04,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 02:29:04,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 02:29:04,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 02:29:04,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 02:29:04,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:04,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 02:29:04,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 02:29:04,726 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-20 02:29:04,727 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-20 02:29:04,728 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-20 02:29:04,729 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-20 02:29:04,972 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 02:29:04,972 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 02:29:04,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:29:04 BoogieIcfgContainer [2019-11-20 02:29:04,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 02:29:04,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 02:29:04,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 02:29:04,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 02:29:04,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 02:29:04" (1/3) ... [2019-11-20 02:29:04,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86f5dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:29:04, skipping insertion in model container [2019-11-20 02:29:04,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 02:29:04" (2/3) ... [2019-11-20 02:29:04,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@86f5dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 02:29:04, skipping insertion in model container [2019-11-20 02:29:04,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:29:04" (3/3) ... [2019-11-20 02:29:04,987 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2019-11-20 02:29:04,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 02:29:05,002 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 02:29:05,012 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 02:29:05,030 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 02:29:05,030 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 02:29:05,030 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 02:29:05,031 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 02:29:05,031 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 02:29:05,031 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 02:29:05,031 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 02:29:05,031 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 02:29:05,045 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 02:29:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 02:29:05,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:05,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:05,052 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-20 02:29:05,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:05,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137059186] [2019-11-20 02:29:05,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:29:05,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137059186] [2019-11-20 02:29:05,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:29:05,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 02:29:05,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062594651] [2019-11-20 02:29:05,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 02:29:05,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:05,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 02:29:05,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:29:05,295 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2019-11-20 02:29:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:05,416 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-20 02:29:05,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:29:05,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-20 02:29:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:05,424 INFO L225 Difference]: With dead ends: 38 [2019-11-20 02:29:05,425 INFO L226 Difference]: Without dead ends: 26 [2019-11-20 02:29:05,428 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 [2019-11-20 02:29:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-20 02:29:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-20 02:29:05,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:29:05,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 02:29:05,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-20 02:29:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:05,469 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 02:29:05,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 02:29:05,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 02:29:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 02:29:05,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:05,471 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:05,471 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-20 02:29:05,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:05,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891856716] [2019-11-20 02:29:05,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 02:29:05,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891856716] [2019-11-20 02:29:05,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 02:29:05,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-20 02:29:05,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209821585] [2019-11-20 02:29:05,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 02:29:05,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:05,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 02:29:05,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 02:29:05,544 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-20 02:29:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:05,742 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-20 02:29:05,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 02:29:05,743 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-20 02:29:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:05,745 INFO L225 Difference]: With dead ends: 32 [2019-11-20 02:29:05,745 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 02:29:05,746 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 [2019-11-20 02:29:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 02:29:05,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-20 02:29:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-20 02:29:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-20 02:29:05,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-20 02:29:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:05,757 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-20 02:29:05,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 02:29:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-20 02:29:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 02:29:05,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:05,760 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:05,760 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:05,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-20 02:29:05,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:05,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778091275] [2019-11-20 02:29:05,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:29:05,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778091275] [2019-11-20 02:29:05,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30821918] [2019-11-20 02:29:05,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:05,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:29:05,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:06,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:29:06,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:06,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-20 02:29:06,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451580930] [2019-11-20 02:29:06,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 02:29:06,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:29:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:29:06,057 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 12 states. [2019-11-20 02:29:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:06,245 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-11-20 02:29:06,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 02:29:06,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-20 02:29:06,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:06,248 INFO L225 Difference]: With dead ends: 59 [2019-11-20 02:29:06,248 INFO L226 Difference]: Without dead ends: 35 [2019-11-20 02:29:06,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:29:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-20 02:29:06,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-20 02:29:06,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 02:29:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-20 02:29:06,261 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-11-20 02:29:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:06,262 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-20 02:29:06,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 02:29:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-20 02:29:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 02:29:06,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:06,264 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:06,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:06,466 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-11-20 02:29:06,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:06,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056388915] [2019-11-20 02:29:06,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:29:06,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056388915] [2019-11-20 02:29:06,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367340145] [2019-11-20 02:29:06,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:06,652 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 02:29:06,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 02:29:06,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:06,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-20 02:29:06,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337801511] [2019-11-20 02:29:06,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 02:29:06,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:06,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 02:29:06,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 02:29:06,696 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 12 states. [2019-11-20 02:29:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:06,966 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-11-20 02:29:06,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 02:29:06,967 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-20 02:29:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:06,970 INFO L225 Difference]: With dead ends: 55 [2019-11-20 02:29:06,970 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 02:29:06,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-11-20 02:29:06,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 02:29:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 02:29:06,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 02:29:06,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-11-20 02:29:06,994 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-11-20 02:29:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:06,995 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-11-20 02:29:06,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 02:29:06,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-11-20 02:29:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 02:29:07,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:07,002 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:07,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:07,203 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:07,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-20 02:29:07,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:07,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302876950] [2019-11-20 02:29:07,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 02:29:07,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302876950] [2019-11-20 02:29:07,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161051916] [2019-11-20 02:29:07,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:07,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:29:07,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-20 02:29:07,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:07,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-11-20 02:29:07,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844054008] [2019-11-20 02:29:07,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 02:29:07,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:07,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 02:29:07,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:29:07,532 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 14 states. [2019-11-20 02:29:07,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:07,993 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-11-20 02:29:07,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 02:29:07,994 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2019-11-20 02:29:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:07,998 INFO L225 Difference]: With dead ends: 114 [2019-11-20 02:29:07,998 INFO L226 Difference]: Without dead ends: 68 [2019-11-20 02:29:07,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:29:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-20 02:29:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-11-20 02:29:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 02:29:08,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-11-20 02:29:08,018 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-11-20 02:29:08,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:08,018 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-11-20 02:29:08,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 02:29:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-11-20 02:29:08,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 02:29:08,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:08,021 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:08,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:08,223 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:08,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:08,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-11-20 02:29:08,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:08,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507644547] [2019-11-20 02:29:08,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 02:29:08,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507644547] [2019-11-20 02:29:08,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933285973] [2019-11-20 02:29:08,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:08,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:29:08,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 02:29:08,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:08,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-11-20 02:29:08,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277750651] [2019-11-20 02:29:08,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 02:29:08,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 02:29:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-20 02:29:08,518 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 14 states. [2019-11-20 02:29:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:08,821 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-11-20 02:29:08,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 02:29:08,822 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-11-20 02:29:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:08,824 INFO L225 Difference]: With dead ends: 147 [2019-11-20 02:29:08,824 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 02:29:08,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:29:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 02:29:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-11-20 02:29:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-20 02:29:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-11-20 02:29:08,839 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-11-20 02:29:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:08,841 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-11-20 02:29:08,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 02:29:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-11-20 02:29:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 02:29:08,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:08,844 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:09,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:09,048 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-11-20 02:29:09,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:09,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656177206] [2019-11-20 02:29:09,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-20 02:29:09,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656177206] [2019-11-20 02:29:09,281 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413125022] [2019-11-20 02:29:09,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:09,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:29:09,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-20 02:29:09,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:09,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-11-20 02:29:09,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92856977] [2019-11-20 02:29:09,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 02:29:09,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:09,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 02:29:09,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-11-20 02:29:09,424 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 18 states. [2019-11-20 02:29:09,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:09,905 INFO L93 Difference]: Finished difference Result 164 states and 279 transitions. [2019-11-20 02:29:09,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 02:29:09,906 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-11-20 02:29:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:09,908 INFO L225 Difference]: With dead ends: 164 [2019-11-20 02:29:09,909 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 02:29:09,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-11-20 02:29:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 02:29:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2019-11-20 02:29:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 02:29:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 145 transitions. [2019-11-20 02:29:09,928 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 145 transitions. Word has length 50 [2019-11-20 02:29:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:09,928 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 145 transitions. [2019-11-20 02:29:09,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 02:29:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 145 transitions. [2019-11-20 02:29:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 02:29:09,933 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:09,933 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:10,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:10,136 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1917551255, now seen corresponding path program 1 times [2019-11-20 02:29:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:10,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380322074] [2019-11-20 02:29:10,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 33 proven. 58 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-20 02:29:10,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380322074] [2019-11-20 02:29:10,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957977168] [2019-11-20 02:29:10,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:10,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:29:10,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 23 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-20 02:29:10,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:10,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2019-11-20 02:29:10,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418007115] [2019-11-20 02:29:10,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 02:29:10,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:10,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 02:29:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-20 02:29:10,701 INFO L87 Difference]: Start difference. First operand 89 states and 145 transitions. Second operand 19 states. [2019-11-20 02:29:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:11,269 INFO L93 Difference]: Finished difference Result 222 states and 415 transitions. [2019-11-20 02:29:11,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 02:29:11,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2019-11-20 02:29:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:11,273 INFO L225 Difference]: With dead ends: 222 [2019-11-20 02:29:11,273 INFO L226 Difference]: Without dead ends: 138 [2019-11-20 02:29:11,274 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2019-11-20 02:29:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-20 02:29:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2019-11-20 02:29:11,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 02:29:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2019-11-20 02:29:11,294 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 91 [2019-11-20 02:29:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:11,295 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2019-11-20 02:29:11,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 02:29:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2019-11-20 02:29:11,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 02:29:11,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:11,300 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:11,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:11,503 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:11,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:11,504 INFO L82 PathProgramCache]: Analyzing trace with hash 358391620, now seen corresponding path program 1 times [2019-11-20 02:29:11,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:11,504 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862465761] [2019-11-20 02:29:11,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 84 proven. 79 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2019-11-20 02:29:11,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862465761] [2019-11-20 02:29:11,917 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006226660] [2019-11-20 02:29:11,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/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 [2019-11-20 02:29:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:11,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 02:29:11,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 66 proven. 52 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-11-20 02:29:12,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:12,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 22 [2019-11-20 02:29:12,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17658987] [2019-11-20 02:29:12,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 02:29:12,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:12,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 02:29:12,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2019-11-20 02:29:12,105 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 22 states. [2019-11-20 02:29:12,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:12,815 INFO L93 Difference]: Finished difference Result 304 states and 608 transitions. [2019-11-20 02:29:12,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 02:29:12,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 105 [2019-11-20 02:29:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:12,819 INFO L225 Difference]: With dead ends: 304 [2019-11-20 02:29:12,819 INFO L226 Difference]: Without dead ends: 153 [2019-11-20 02:29:12,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-11-20 02:29:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-20 02:29:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 130. [2019-11-20 02:29:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-20 02:29:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 209 transitions. [2019-11-20 02:29:12,857 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 209 transitions. Word has length 105 [2019-11-20 02:29:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:12,858 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 209 transitions. [2019-11-20 02:29:12,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 02:29:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 209 transitions. [2019-11-20 02:29:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-20 02:29:12,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:12,862 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:13,065 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:13,067 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1449179333, now seen corresponding path program 2 times [2019-11-20 02:29:13,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:13,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351430622] [2019-11-20 02:29:13,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-20 02:29:13,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351430622] [2019-11-20 02:29:13,212 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177144232] [2019-11-20 02:29:13,212 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:13,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 02:29:13,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:29:13,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 02:29:13,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-20 02:29:13,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 02:29:13,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 9 [2019-11-20 02:29:13,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363871375] [2019-11-20 02:29:13,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 02:29:13,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:13,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 02:29:13,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 02:29:13,317 INFO L87 Difference]: Start difference. First operand 130 states and 209 transitions. Second operand 6 states. [2019-11-20 02:29:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:13,378 INFO L93 Difference]: Finished difference Result 236 states and 406 transitions. [2019-11-20 02:29:13,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 02:29:13,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-11-20 02:29:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:13,381 INFO L225 Difference]: With dead ends: 236 [2019-11-20 02:29:13,382 INFO L226 Difference]: Without dead ends: 109 [2019-11-20 02:29:13,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 02:29:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-20 02:29:13,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-11-20 02:29:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-20 02:29:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 156 transitions. [2019-11-20 02:29:13,405 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 156 transitions. Word has length 104 [2019-11-20 02:29:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:13,406 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 156 transitions. [2019-11-20 02:29:13,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 02:29:13,406 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 156 transitions. [2019-11-20 02:29:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-20 02:29:13,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:13,409 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:13,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:13,620 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 311986411, now seen corresponding path program 3 times [2019-11-20 02:29:13,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:13,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193190769] [2019-11-20 02:29:13,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:13,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 92 proven. 147 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-20 02:29:14,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193190769] [2019-11-20 02:29:14,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672454551] [2019-11-20 02:29:14,084 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:14,140 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 02:29:14,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:29:14,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 02:29:14,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 127 proven. 29 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-11-20 02:29:14,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:14,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 27 [2019-11-20 02:29:14,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127136993] [2019-11-20 02:29:14,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-20 02:29:14,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-20 02:29:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2019-11-20 02:29:14,302 INFO L87 Difference]: Start difference. First operand 106 states and 156 transitions. Second operand 27 states. [2019-11-20 02:29:15,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:15,142 INFO L93 Difference]: Finished difference Result 245 states and 416 transitions. [2019-11-20 02:29:15,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-20 02:29:15,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-20 02:29:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:15,144 INFO L225 Difference]: With dead ends: 245 [2019-11-20 02:29:15,144 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 02:29:15,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 02:29:15,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 02:29:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2019-11-20 02:29:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-20 02:29:15,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2019-11-20 02:29:15,164 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 132 [2019-11-20 02:29:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:15,166 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2019-11-20 02:29:15,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-20 02:29:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2019-11-20 02:29:15,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-20 02:29:15,168 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:15,169 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:15,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:15,377 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:15,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1882786525, now seen corresponding path program 4 times [2019-11-20 02:29:15,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:15,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183105929] [2019-11-20 02:29:15,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 02:29:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-20 02:29:15,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183105929] [2019-11-20 02:29:15,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544180662] [2019-11-20 02:29:15,653 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:15,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 02:29:15,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 02:29:15,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 02:29:15,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 02:29:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-11-20 02:29:15,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 02:29:15,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2019-11-20 02:29:15,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802330324] [2019-11-20 02:29:15,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 02:29:15,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 02:29:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 02:29:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2019-11-20 02:29:15,783 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand 21 states. [2019-11-20 02:29:16,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 02:29:16,157 INFO L93 Difference]: Finished difference Result 245 states and 346 transitions. [2019-11-20 02:29:16,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 02:29:16,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-11-20 02:29:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 02:29:16,159 INFO L225 Difference]: With dead ends: 245 [2019-11-20 02:29:16,160 INFO L226 Difference]: Without dead ends: 135 [2019-11-20 02:29:16,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2019-11-20 02:29:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-20 02:29:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 119. [2019-11-20 02:29:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-11-20 02:29:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 156 transitions. [2019-11-20 02:29:16,174 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 156 transitions. Word has length 91 [2019-11-20 02:29:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 02:29:16,174 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 156 transitions. [2019-11-20 02:29:16,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 02:29:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 156 transitions. [2019-11-20 02:29:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 02:29:16,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 02:29:16,176 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 02:29:16,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 02:29:16,377 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 02:29:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 02:29:16,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1335172610, now seen corresponding path program 5 times [2019-11-20 02:29:16,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 02:29:16,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493961881] [2019-11-20 02:29:16,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 02:29:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:29:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 02:29:16,415 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 02:29:16,415 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 02:29:16,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 02:29:16 BoogieIcfgContainer [2019-11-20 02:29:16,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 02:29:16,469 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 02:29:16,469 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 02:29:16,470 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 02:29:16,470 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 02:29:04" (3/4) ... [2019-11-20 02:29:16,472 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 02:29:16,544 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e5e0fe7f-6da5-47e7-b545-10120983c551/bin/uautomizer/witness.graphml [2019-11-20 02:29:16,544 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 02:29:16,546 INFO L168 Benchmark]: Toolchain (without parser) took 12217.69 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 327.7 MB). Free memory was 950.1 MB in the beginning and 1.0 GB in the end (delta: -78.1 MB). Peak memory consumption was 249.6 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,547 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. [2019-11-20 02:29:16,547 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.86 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. [2019-11-20 02:29:16,548 INFO L168 Benchmark]: Boogie Preprocessor took 29.56 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,548 INFO L168 Benchmark]: RCFGBuilder took 317.30 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,549 INFO L168 Benchmark]: TraceAbstraction took 11494.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.8 MB). Peak memory consumption was 263.6 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,549 INFO L168 Benchmark]: Witness Printer took 75.39 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-11-20 02:29:16,551 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 258.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -190.4 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.86 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 29.56 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 317.30 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: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 11494.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 83.8 MB). Peak memory consumption was 263.6 MB. Max. memory is 11.5 GB. * Witness Printer took 75.39 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; [L37] CALL, EXPR fibo1(x) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: UNSAFE, OverallTime: 11.4s, OverallIterations: 13, TraceHistogramMax: 10, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 311 SDtfs, 561 SDslu, 2229 SDs, 0 SdLazy, 3852 SolverSat, 540 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1096 GetRequests, 871 SyntacticMatches, 3 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred 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: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 124 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1502 NumberOfCodeBlocks, 1434 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1375 ConstructedInterpolants, 0 QuantifiedInterpolants, 220661 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1398 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 22 InterpolantComputations, 3 PerfectInterpolantSequences, 2277/2852 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...