./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 20:22:01,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:22:01,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:22:01,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:22:01,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:22:01,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:22:01,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:22:01,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:22:01,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:22:01,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:22:01,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:22:01,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:22:01,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:22:01,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:22:01,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:22:01,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:22:01,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:22:01,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:22:01,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:22:01,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:22:01,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:22:01,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:22:01,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:22:01,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:22:01,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:22:01,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:22:01,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:22:01,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:22:01,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:22:01,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:22:01,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:22:01,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:22:01,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:22:01,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:22:01,547 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:22:01,547 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:22:01,549 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:22:01,549 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:22:01,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:22:01,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:22:01,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:22:01,555 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:22:01,572 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:22:01,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:22:01,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:22:01,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:22:01,576 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:22:01,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:22:01,576 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:22:01,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:22:01,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:22:01,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:22:01,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:22:01,579 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:22:01,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:22:01,579 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:22:01,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:22:01,579 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:22:01,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:22:01,580 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:22:01,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:22:01,582 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:22:01,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:22:01,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:22:01,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:22:01,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:22:01,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:22:01,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:22:01,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:22:01,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:22:01,587 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_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-11-15 20:22:01,631 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:22:01,642 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:22:01,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:22:01,647 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:22:01,648 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:22:01,648 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-15 20:22:01,713 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/data/8bf2f928c/13a371e9749f4abaa00c093f2bae2749/FLAGe67cb1d47 [2019-11-15 20:22:02,218 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:22:02,221 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-15 20:22:02,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/data/8bf2f928c/13a371e9749f4abaa00c093f2bae2749/FLAGe67cb1d47 [2019-11-15 20:22:02,589 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/data/8bf2f928c/13a371e9749f4abaa00c093f2bae2749 [2019-11-15 20:22:02,592 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:22:02,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:22:02,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:22:02,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:22:02,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:22:02,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:02,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e057b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02, skipping insertion in model container [2019-11-15 20:22:02,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:02,612 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:22:02,630 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:22:02,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:22:02,962 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:22:02,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:22:02,994 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:22:02,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02 WrapperNode [2019-11-15 20:22:02,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:22:02,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:22:02,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:22:02,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:22:03,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:22:03,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:22:03,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:22:03,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:22:03,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... [2019-11-15 20:22:03,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:22:03,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:22:03,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:22:03,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:22:03,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:22:03,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:22:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-15 20:22:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-15 20:22:03,318 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:22:03,319 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 20:22:03,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:22:03 BoogieIcfgContainer [2019-11-15 20:22:03,329 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:22:03,330 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:22:03,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:22:03,334 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:22:03,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:22:02" (1/3) ... [2019-11-15 20:22:03,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b4141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:22:03, skipping insertion in model container [2019-11-15 20:22:03,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:22:02" (2/3) ... [2019-11-15 20:22:03,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@268b4141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:22:03, skipping insertion in model container [2019-11-15 20:22:03,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:22:03" (3/3) ... [2019-11-15 20:22:03,348 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-11-15 20:22:03,376 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:22:03,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:22:03,396 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:22:03,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:22:03,422 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:22:03,422 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:22:03,423 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:22:03,423 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:22:03,423 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:22:03,423 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:22:03,424 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:22:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-15 20:22:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-15 20:22:03,449 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:03,450 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:03,452 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-11-15 20:22:03,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:03,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750529025] [2019-11-15 20:22:03,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:03,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:03,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:22:03,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750529025] [2019-11-15 20:22:03,721 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:22:03,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 20:22:03,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740014311] [2019-11-15 20:22:03,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 20:22:03,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 20:22:03,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:22:03,742 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-11-15 20:22:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:03,903 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-15 20:22:03,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:22:03,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-15 20:22:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:03,920 INFO L225 Difference]: With dead ends: 29 [2019-11-15 20:22:03,920 INFO L226 Difference]: Without dead ends: 17 [2019-11-15 20:22:03,924 INFO L600 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 [2019-11-15 20:22:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-15 20:22:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-15 20:22:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 20:22:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-15 20:22:03,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-11-15 20:22:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:03,999 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 20:22:03,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 20:22:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-15 20:22:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 20:22:04,002 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:04,003 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:04,003 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:04,004 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-11-15 20:22:04,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:04,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776181274] [2019-11-15 20:22:04,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 20:22:04,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776181274] [2019-11-15 20:22:04,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:22:04,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-15 20:22:04,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593013726] [2019-11-15 20:22:04,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-15 20:22:04,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:04,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-15 20:22:04,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-15 20:22:04,101 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-11-15 20:22:04,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:04,236 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-11-15 20:22:04,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 20:22:04,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-15 20:22:04,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:04,241 INFO L225 Difference]: With dead ends: 23 [2019-11-15 20:22:04,241 INFO L226 Difference]: Without dead ends: 19 [2019-11-15 20:22:04,242 INFO L600 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 [2019-11-15 20:22:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-15 20:22:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-15 20:22:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 20:22:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-15 20:22:04,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-11-15 20:22:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:04,258 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 20:22:04,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-15 20:22:04,258 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-15 20:22:04,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-15 20:22:04,260 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:04,261 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:04,261 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-11-15 20:22:04,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:04,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438350248] [2019-11-15 20:22:04,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 20:22:04,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438350248] [2019-11-15 20:22:04,465 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877476071] [2019-11-15 20:22:04,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:04,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 20:22:04,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 20:22:04,585 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:04,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-11-15 20:22:04,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454442248] [2019-11-15 20:22:04,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 20:22:04,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:04,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 20:22:04,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 20:22:04,588 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 10 states. [2019-11-15 20:22:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:04,734 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2019-11-15 20:22:04,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 20:22:04,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-15 20:22:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:04,736 INFO L225 Difference]: With dead ends: 41 [2019-11-15 20:22:04,737 INFO L226 Difference]: Without dead ends: 26 [2019-11-15 20:22:04,738 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-15 20:22:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-15 20:22:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-15 20:22:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-15 20:22:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2019-11-15 20:22:04,747 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 22 [2019-11-15 20:22:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:04,748 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2019-11-15 20:22:04,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 20:22:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2019-11-15 20:22:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-15 20:22:04,750 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:04,750 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:04,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:04,956 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:04,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 178931364, now seen corresponding path program 1 times [2019-11-15 20:22:04,957 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:04,957 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843636017] [2019-11-15 20:22:04,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:04,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 20:22:05,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843636017] [2019-11-15 20:22:05,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311055275] [2019-11-15 20:22:05,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 20:22:05,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-15 20:22:05,198 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:05,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 10 [2019-11-15 20:22:05,199 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868616918] [2019-11-15 20:22:05,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 20:22:05,200 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:05,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 20:22:05,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-15 20:22:05,200 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 10 states. [2019-11-15 20:22:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:05,371 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-15 20:22:05,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 20:22:05,372 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-15 20:22:05,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:05,375 INFO L225 Difference]: With dead ends: 47 [2019-11-15 20:22:05,375 INFO L226 Difference]: Without dead ends: 43 [2019-11-15 20:22:05,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-15 20:22:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-15 20:22:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-11-15 20:22:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-15 20:22:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 58 transitions. [2019-11-15 20:22:05,406 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 58 transitions. Word has length 23 [2019-11-15 20:22:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:05,408 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 58 transitions. [2019-11-15 20:22:05,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 20:22:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 58 transitions. [2019-11-15 20:22:05,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-15 20:22:05,412 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:05,413 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:05,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:05,617 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:05,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1840059703, now seen corresponding path program 2 times [2019-11-15 20:22:05,622 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:05,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008982519] [2019-11-15 20:22:05,623 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:05,623 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:05,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 20:22:05,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008982519] [2019-11-15 20:22:05,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001468109] [2019-11-15 20:22:05,815 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:05,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:22:05,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:22:05,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 20:22:05,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-15 20:22:05,928 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:05,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2019-11-15 20:22:05,929 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877263129] [2019-11-15 20:22:05,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 20:22:05,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 20:22:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-15 20:22:05,931 INFO L87 Difference]: Start difference. First operand 40 states and 58 transitions. Second operand 12 states. [2019-11-15 20:22:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:06,192 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2019-11-15 20:22:06,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-15 20:22:06,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-15 20:22:06,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:06,195 INFO L225 Difference]: With dead ends: 67 [2019-11-15 20:22:06,195 INFO L226 Difference]: Without dead ends: 29 [2019-11-15 20:22:06,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-15 20:22:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-15 20:22:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-15 20:22:06,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-15 20:22:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-15 20:22:06,204 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 35 [2019-11-15 20:22:06,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:06,209 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-15 20:22:06,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 20:22:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-15 20:22:06,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-15 20:22:06,213 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:06,213 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:06,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:06,421 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:06,421 INFO L82 PathProgramCache]: Analyzing trace with hash 624826665, now seen corresponding path program 2 times [2019-11-15 20:22:06,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:06,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580608429] [2019-11-15 20:22:06,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:06,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:06,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-15 20:22:06,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580608429] [2019-11-15 20:22:06,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612392953] [2019-11-15 20:22:06,638 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:06,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 20:22:06,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:22:06,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 20:22:06,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-15 20:22:06,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:06,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 12 [2019-11-15 20:22:06,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077762592] [2019-11-15 20:22:06,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-15 20:22:06,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:06,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-15 20:22:06,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-15 20:22:06,724 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 12 states. [2019-11-15 20:22:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:06,920 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-15 20:22:06,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-15 20:22:06,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-11-15 20:22:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:06,923 INFO L225 Difference]: With dead ends: 52 [2019-11-15 20:22:06,923 INFO L226 Difference]: Without dead ends: 48 [2019-11-15 20:22:06,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-15 20:22:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-15 20:22:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2019-11-15 20:22:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-15 20:22:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2019-11-15 20:22:06,945 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 37 [2019-11-15 20:22:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:06,945 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2019-11-15 20:22:06,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-15 20:22:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2019-11-15 20:22:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-15 20:22:06,954 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:06,955 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 8, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:07,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:07,165 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:07,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1133813247, now seen corresponding path program 3 times [2019-11-15 20:22:07,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:07,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566295263] [2019-11-15 20:22:07,165 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:07,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:07,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 73 proven. 128 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-11-15 20:22:07,600 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566295263] [2019-11-15 20:22:07,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119563779] [2019-11-15 20:22:07,601 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:07,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-15 20:22:07,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:22:07,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-15 20:22:07,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 12 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-11-15 20:22:07,770 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:07,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-15 20:22:07,771 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726160289] [2019-11-15 20:22:07,771 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-15 20:22:07,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-15 20:22:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-15 20:22:07,772 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand 16 states. [2019-11-15 20:22:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:08,067 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-11-15 20:22:08,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-15 20:22:08,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 89 [2019-11-15 20:22:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:08,070 INFO L225 Difference]: With dead ends: 94 [2019-11-15 20:22:08,070 INFO L226 Difference]: Without dead ends: 54 [2019-11-15 20:22:08,072 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2019-11-15 20:22:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-15 20:22:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2019-11-15 20:22:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-15 20:22:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2019-11-15 20:22:08,086 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 89 [2019-11-15 20:22:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:08,087 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2019-11-15 20:22:08,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-15 20:22:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2019-11-15 20:22:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-15 20:22:08,089 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:08,090 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:08,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:08,294 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash -91709127, now seen corresponding path program 4 times [2019-11-15 20:22:08,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:08,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19181303] [2019-11-15 20:22:08,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:08,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:08,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-11-15 20:22:08,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19181303] [2019-11-15 20:22:08,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752182368] [2019-11-15 20:22:08,723 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:08,794 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-15 20:22:08,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:22:08,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 20:22:08,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-15 20:22:08,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:08,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 19 [2019-11-15 20:22:08,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071420844] [2019-11-15 20:22:08,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-15 20:22:08,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:08,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-15 20:22:08,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-11-15 20:22:08,878 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 19 states. [2019-11-15 20:22:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:09,253 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-11-15 20:22:09,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-15 20:22:09,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2019-11-15 20:22:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:09,256 INFO L225 Difference]: With dead ends: 93 [2019-11-15 20:22:09,256 INFO L226 Difference]: Without dead ends: 53 [2019-11-15 20:22:09,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-11-15 20:22:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-15 20:22:09,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2019-11-15 20:22:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-15 20:22:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-11-15 20:22:09,281 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 78 [2019-11-15 20:22:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:09,282 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-11-15 20:22:09,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-15 20:22:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-11-15 20:22:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-15 20:22:09,290 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:09,290 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:09,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:09,495 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2413653, now seen corresponding path program 5 times [2019-11-15 20:22:09,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:09,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563855435] [2019-11-15 20:22:09,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:09,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:09,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:22:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 198 proven. 308 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-15 20:22:10,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563855435] [2019-11-15 20:22:10,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557485515] [2019-11-15 20:22:10,189 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/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 [2019-11-15 20:22:10,283 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-15 20:22:10,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 20:22:10,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-15 20:22:10,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:22:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2019-11-15 20:22:10,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:22:10,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 24 [2019-11-15 20:22:10,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078127101] [2019-11-15 20:22:10,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-15 20:22:10,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:22:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-15 20:22:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-11-15 20:22:10,424 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 24 states. [2019-11-15 20:22:10,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:22:10,958 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-11-15 20:22:10,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-15 20:22:10,959 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 132 [2019-11-15 20:22:10,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:22:10,961 INFO L225 Difference]: With dead ends: 110 [2019-11-15 20:22:10,961 INFO L226 Difference]: Without dead ends: 69 [2019-11-15 20:22:10,963 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2019-11-15 20:22:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-15 20:22:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2019-11-15 20:22:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-15 20:22:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2019-11-15 20:22:10,975 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 132 [2019-11-15 20:22:10,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:22:10,976 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2019-11-15 20:22:10,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-15 20:22:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2019-11-15 20:22:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-15 20:22:10,978 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:22:10,979 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-11-15 20:22:11,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:22:11,183 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:22:11,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:22:11,184 INFO L82 PathProgramCache]: Analyzing trace with hash 548614988, now seen corresponding path program 6 times [2019-11-15 20:22:11,184 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:22:11,184 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309631820] [2019-11-15 20:22:11,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:11,184 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:22:11,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:22:11,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:22:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:22:11,236 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 20:22:11,237 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 20:22:11,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 08:22:11 BoogieIcfgContainer [2019-11-15 20:22:11,280 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 20:22:11,281 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 20:22:11,281 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 20:22:11,281 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 20:22:11,282 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:22:03" (3/4) ... [2019-11-15 20:22:11,284 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 20:22:11,356 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_932849c9-3c1e-4198-9f50-9fac796adbaf/bin/uautomizer/witness.graphml [2019-11-15 20:22:11,356 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 20:22:11,359 INFO L168 Benchmark]: Toolchain (without parser) took 8764.51 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 272.1 MB). Free memory was 943.5 MB in the beginning and 1.2 GB in the end (delta: -246.5 MB). Peak memory consumption was 25.6 MB. Max. memory is 11.5 GB. [2019-11-15 20:22:11,359 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:22:11,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 943.5 MB in the beginning and 1.2 GB in the end (delta: -214.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 20:22:11,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:22:11,361 INFO L168 Benchmark]: Boogie Preprocessor took 20.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:22:11,361 INFO L168 Benchmark]: RCFGBuilder took 276.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 11.5 GB. [2019-11-15 20:22:11,362 INFO L168 Benchmark]: TraceAbstraction took 7950.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.8 MB). Peak memory consumption was 39.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:22:11,362 INFO L168 Benchmark]: Witness Printer took 75.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. [2019-11-15 20:22:11,364 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 962.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 400.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 943.5 MB in the beginning and 1.2 GB in the end (delta: -214.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.33 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.35 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 276.20 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7950.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 105.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -66.8 MB). Peak memory consumption was 39.1 MB. Max. memory is 11.5 GB. * Witness Printer took 75.63 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 7.8s, OverallIterations: 10, TraceHistogramMax: 19, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 133 SDtfs, 322 SDslu, 549 SDs, 0 SdLazy, 1208 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 665 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 38 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 956 NumberOfCodeBlocks, 875 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 835 ConstructedInterpolants, 0 QuantifiedInterpolants, 141155 SizeOfPredicates, 31 NumberOfNonLiveVariables, 755 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 2359/3498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...