./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.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/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:02:39,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:02:39,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:02:39,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:02:39,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:02:39,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:02:39,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:02:39,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:02:39,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:02:39,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:02:39,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:02:39,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:02:39,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:02:39,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:02:39,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:02:39,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:02:39,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:02:39,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:02:39,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:02:39,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:02:39,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:02:39,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:02:39,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:02:39,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:02:39,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:02:39,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:02:39,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:02:39,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:02:39,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:02:39,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:02:39,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:02:39,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:02:39,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:02:39,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:02:39,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:02:39,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:02:39,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:02:39,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:02:39,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:02:39,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:02:39,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:02:39,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:02:39,478 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:02:39,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:02:39,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:02:39,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:02:39,479 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:02:39,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:02:39,480 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:02:39,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:02:39,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:02:39,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:02:39,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:02:39,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:02:39,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:02:39,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:02:39,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:02:39,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:02:39,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:02:39,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:02:39,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:02:39,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:02:39,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:02:39,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:02:39,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:02:39,484 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/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-10-22 09:02:39,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:02:39,517 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:02:39,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:02:39,521 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:02:39,521 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:02:39,522 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-10-22 09:02:39,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/data/44ac7eba0/8ddce34fe9c940759f00e695fb408bf3/FLAG26c5e85f7 [2019-10-22 09:02:39,919 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:02:39,920 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-10-22 09:02:39,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/data/44ac7eba0/8ddce34fe9c940759f00e695fb408bf3/FLAG26c5e85f7 [2019-10-22 09:02:40,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/data/44ac7eba0/8ddce34fe9c940759f00e695fb408bf3 [2019-10-22 09:02:40,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:02:40,343 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:02:40,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:40,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:02:40,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:02:40,348 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428f38d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40, skipping insertion in model container [2019-10-22 09:02:40,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,357 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:02:40,370 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:02:40,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:40,495 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:02:40,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:02:40,572 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:02:40,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40 WrapperNode [2019-10-22 09:02:40,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:02:40,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:40,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:02:40,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:02:40,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:02:40,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:02:40,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:02:40,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:02:40,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... [2019-10-22 09:02:40,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:02:40,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:02:40,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:02:40,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:02:40,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:40,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:02:40,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:02:40,683 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-10-22 09:02:40,683 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-10-22 09:02:40,683 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-10-22 09:02:40,683 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-10-22 09:02:40,886 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:02:40,886 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 09:02:40,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:40 BoogieIcfgContainer [2019-10-22 09:02:40,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:02:40,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:02:40,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:02:40,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:02:40,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:02:40" (1/3) ... [2019-10-22 09:02:40,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b139f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:40, skipping insertion in model container [2019-10-22 09:02:40,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:02:40" (2/3) ... [2019-10-22 09:02:40,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b139f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:02:40, skipping insertion in model container [2019-10-22 09:02:40,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:40" (3/3) ... [2019-10-22 09:02:40,902 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-10-22 09:02:40,910 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:02:40,917 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:02:40,950 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:02:40,974 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:02:40,974 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:02:40,974 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:02:40,974 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:02:40,974 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:02:40,974 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:02:40,974 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:02:40,975 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:02:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-22 09:02:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 09:02:40,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:40,995 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:40,996 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-10-22 09:02:41,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:41,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008404869] [2019-10-22 09:02:41,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:41,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008404869] [2019-10-22 09:02:41,143 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:41,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:02:41,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087031309] [2019-10-22 09:02:41,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:41,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:41,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:41,159 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2019-10-22 09:02:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:41,240 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-10-22 09:02:41,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:41,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 09:02:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:41,250 INFO L225 Difference]: With dead ends: 38 [2019-10-22 09:02:41,250 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 09:02:41,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 09:02:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-22 09:02:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-10-22 09:02:41,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-10-22 09:02:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:41,298 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-10-22 09:02:41,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 09:02:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 09:02:41,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:41,300 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:41,300 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-10-22 09:02:41,301 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:41,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384551338] [2019-10-22 09:02:41,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:02:41,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384551338] [2019-10-22 09:02:41,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:02:41,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:02:41,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366197471] [2019-10-22 09:02:41,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:02:41,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:02:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:02:41,340 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-10-22 09:02:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:41,387 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-10-22 09:02:41,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 09:02:41,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 09:02:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:41,389 INFO L225 Difference]: With dead ends: 32 [2019-10-22 09:02:41,389 INFO L226 Difference]: Without dead ends: 28 [2019-10-22 09:02:41,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:02:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-22 09:02:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-22 09:02:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-22 09:02:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-10-22 09:02:41,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-10-22 09:02:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:41,396 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-10-22 09:02:41,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:02:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 09:02:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:02:41,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:41,397 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:41,398 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-10-22 09:02:41,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:41,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957814096] [2019-10-22 09:02:41,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:41,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957814096] [2019-10-22 09:02:41,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606603702] [2019-10-22 09:02:41,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:41,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:41,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:41,615 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:41,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-10-22 09:02:41,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234696480] [2019-10-22 09:02:41,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:02:41,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:02:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:02:41,616 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 10 states. [2019-10-22 09:02:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:41,766 INFO L93 Difference]: Finished difference Result 59 states and 83 transitions. [2019-10-22 09:02:41,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:02:41,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-10-22 09:02:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:41,769 INFO L225 Difference]: With dead ends: 59 [2019-10-22 09:02:41,769 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 09:02:41,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:02:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 09:02:41,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-22 09:02:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 09:02:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-10-22 09:02:41,784 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 22 [2019-10-22 09:02:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:41,785 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-10-22 09:02:41,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:02:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-10-22 09:02:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 09:02:41,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:41,787 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:41,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:41,987 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:41,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:41,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1285987244, now seen corresponding path program 1 times [2019-10-22 09:02:41,988 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:41,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826473782] [2019-10-22 09:02:41,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:41,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:42,108 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826473782] [2019-10-22 09:02:42,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656415294] [2019-10-22 09:02:42,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:42,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:02:42,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:42,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2019-10-22 09:02:42,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514724039] [2019-10-22 09:02:42,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:02:42,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:02:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:02:42,164 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 10 states. [2019-10-22 09:02:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:42,349 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-10-22 09:02:42,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:02:42,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-22 09:02:42,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:42,352 INFO L225 Difference]: With dead ends: 55 [2019-10-22 09:02:42,352 INFO L226 Difference]: Without dead ends: 51 [2019-10-22 09:02:42,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:02:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-22 09:02:42,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-10-22 09:02:42,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-22 09:02:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2019-10-22 09:02:42,370 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 23 [2019-10-22 09:02:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:42,372 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2019-10-22 09:02:42,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:02:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2019-10-22 09:02:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-22 09:02:42,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:42,373 INFO L380 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] [2019-10-22 09:02:42,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:42,576 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:42,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-10-22 09:02:42,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:42,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657923855] [2019-10-22 09:02:42,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:42,576 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:42,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:02:42,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657923855] [2019-10-22 09:02:42,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237217314] [2019-10-22 09:02:42,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:42,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:42,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 09:02:42,757 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:42,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-10-22 09:02:42,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567040485] [2019-10-22 09:02:42,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:02:42,758 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:42,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:02:42,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:02:42,758 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand 12 states. [2019-10-22 09:02:43,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:43,024 INFO L93 Difference]: Finished difference Result 114 states and 187 transitions. [2019-10-22 09:02:43,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:02:43,025 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-10-22 09:02:43,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:43,026 INFO L225 Difference]: With dead ends: 114 [2019-10-22 09:02:43,027 INFO L226 Difference]: Without dead ends: 68 [2019-10-22 09:02:43,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:02:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-22 09:02:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2019-10-22 09:02:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:02:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 98 transitions. [2019-10-22 09:02:43,042 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 98 transitions. Word has length 35 [2019-10-22 09:02:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:43,043 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 98 transitions. [2019-10-22 09:02:43,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:02:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 98 transitions. [2019-10-22 09:02:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-22 09:02:43,044 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:43,044 INFO L380 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] [2019-10-22 09:02:43,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:43,245 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:43,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2000747716, now seen corresponding path program 1 times [2019-10-22 09:02:43,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:43,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187387104] [2019-10-22 09:02:43,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-22 09:02:43,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187387104] [2019-10-22 09:02:43,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803358608] [2019-10-22 09:02:43,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:43,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-22 09:02:43,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:43,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2019-10-22 09:02:43,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756158934] [2019-10-22 09:02:43,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:02:43,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:43,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:02:43,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:02:43,429 INFO L87 Difference]: Start difference. First operand 66 states and 98 transitions. Second operand 12 states. [2019-10-22 09:02:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:43,667 INFO L93 Difference]: Finished difference Result 147 states and 239 transitions. [2019-10-22 09:02:43,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:02:43,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-10-22 09:02:43,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:43,670 INFO L225 Difference]: With dead ends: 147 [2019-10-22 09:02:43,670 INFO L226 Difference]: Without dead ends: 83 [2019-10-22 09:02:43,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:02:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-22 09:02:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 66. [2019-10-22 09:02:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-22 09:02:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 96 transitions. [2019-10-22 09:02:43,694 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 96 transitions. Word has length 36 [2019-10-22 09:02:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:43,694 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 96 transitions. [2019-10-22 09:02:43,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:02:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 96 transitions. [2019-10-22 09:02:43,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-22 09:02:43,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:43,701 INFO L380 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] [2019-10-22 09:02:43,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:43,902 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:43,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:43,902 INFO L82 PathProgramCache]: Analyzing trace with hash -434541687, now seen corresponding path program 1 times [2019-10-22 09:02:43,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:43,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297008799] [2019-10-22 09:02:43,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:43,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:43,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-22 09:02:44,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297008799] [2019-10-22 09:02:44,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379979801] [2019-10-22 09:02:44,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:44,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 09:02:44,152 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:44,152 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2019-10-22 09:02:44,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807287367] [2019-10-22 09:02:44,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:02:44,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:02:44,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:02:44,153 INFO L87 Difference]: Start difference. First operand 66 states and 96 transitions. Second operand 15 states. [2019-10-22 09:02:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:44,470 INFO L93 Difference]: Finished difference Result 163 states and 263 transitions. [2019-10-22 09:02:44,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 09:02:44,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-10-22 09:02:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:44,471 INFO L225 Difference]: With dead ends: 163 [2019-10-22 09:02:44,471 INFO L226 Difference]: Without dead ends: 99 [2019-10-22 09:02:44,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:02:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-22 09:02:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2019-10-22 09:02:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-22 09:02:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 143 transitions. [2019-10-22 09:02:44,488 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 143 transitions. Word has length 50 [2019-10-22 09:02:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:44,488 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 143 transitions. [2019-10-22 09:02:44,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:02:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 143 transitions. [2019-10-22 09:02:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-22 09:02:44,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:44,492 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:44,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:44,694 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:44,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:44,694 INFO L82 PathProgramCache]: Analyzing trace with hash -751947822, now seen corresponding path program 1 times [2019-10-22 09:02:44,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:44,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479411476] [2019-10-22 09:02:44,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:44,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-22 09:02:44,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479411476] [2019-10-22 09:02:44,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279890336] [2019-10-22 09:02:44,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:44,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 09:02:44,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-22 09:02:44,944 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:44,944 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 15 [2019-10-22 09:02:44,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032623001] [2019-10-22 09:02:44,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:02:44,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:44,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:02:44,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:02:44,945 INFO L87 Difference]: Start difference. First operand 91 states and 143 transitions. Second operand 15 states. [2019-10-22 09:02:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:45,216 INFO L93 Difference]: Finished difference Result 182 states and 293 transitions. [2019-10-22 09:02:45,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:02:45,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 51 [2019-10-22 09:02:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:45,218 INFO L225 Difference]: With dead ends: 182 [2019-10-22 09:02:45,218 INFO L226 Difference]: Without dead ends: 91 [2019-10-22 09:02:45,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:02:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-22 09:02:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-22 09:02:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-22 09:02:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 123 transitions. [2019-10-22 09:02:45,230 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 123 transitions. Word has length 51 [2019-10-22 09:02:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:45,231 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 123 transitions. [2019-10-22 09:02:45,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:02:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 123 transitions. [2019-10-22 09:02:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-22 09:02:45,232 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:45,232 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:45,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:45,433 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:45,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:45,433 INFO L82 PathProgramCache]: Analyzing trace with hash -26046796, now seen corresponding path program 1 times [2019-10-22 09:02:45,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:45,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667029799] [2019-10-22 09:02:45,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:45,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-22 09:02:45,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667029799] [2019-10-22 09:02:45,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140323386] [2019-10-22 09:02:45,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:45,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-22 09:02:45,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-22 09:02:46,002 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:46,002 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2019-10-22 09:02:46,003 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428416505] [2019-10-22 09:02:46,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:02:46,005 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:46,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:02:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:02:46,005 INFO L87 Difference]: Start difference. First operand 83 states and 123 transitions. Second operand 21 states. [2019-10-22 09:02:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:46,203 INFO L93 Difference]: Finished difference Result 118 states and 179 transitions. [2019-10-22 09:02:46,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:02:46,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2019-10-22 09:02:46,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:46,204 INFO L225 Difference]: With dead ends: 118 [2019-10-22 09:02:46,204 INFO L226 Difference]: Without dead ends: 114 [2019-10-22 09:02:46,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:02:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-22 09:02:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93. [2019-10-22 09:02:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-22 09:02:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2019-10-22 09:02:46,218 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 144 transitions. Word has length 64 [2019-10-22 09:02:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:46,218 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 144 transitions. [2019-10-22 09:02:46,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:02:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 144 transitions. [2019-10-22 09:02:46,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-22 09:02:46,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:46,220 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:46,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:46,421 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash 629760405, now seen corresponding path program 2 times [2019-10-22 09:02:46,421 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:46,421 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745098339] [2019-10-22 09:02:46,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,421 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:46,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 51 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-22 09:02:46,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745098339] [2019-10-22 09:02:46,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560917567] [2019-10-22 09:02:46,662 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:46,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:02:46,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:46,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:02:46,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:46,774 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 17 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-22 09:02:46,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:46,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2019-10-22 09:02:46,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424056560] [2019-10-22 09:02:46,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:02:46,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:02:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:02:46,776 INFO L87 Difference]: Start difference. First operand 93 states and 144 transitions. Second operand 20 states. [2019-10-22 09:02:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:47,133 INFO L93 Difference]: Finished difference Result 222 states and 411 transitions. [2019-10-22 09:02:47,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 09:02:47,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-10-22 09:02:47,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:47,135 INFO L225 Difference]: With dead ends: 222 [2019-10-22 09:02:47,135 INFO L226 Difference]: Without dead ends: 123 [2019-10-22 09:02:47,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2019-10-22 09:02:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-22 09:02:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2019-10-22 09:02:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-10-22 09:02:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 148 transitions. [2019-10-22 09:02:47,148 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 148 transitions. Word has length 78 [2019-10-22 09:02:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:47,148 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 148 transitions. [2019-10-22 09:02:47,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:02:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 148 transitions. [2019-10-22 09:02:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-22 09:02:47,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:47,149 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:47,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:47,350 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash -33377407, now seen corresponding path program 1 times [2019-10-22 09:02:47,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:47,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389516571] [2019-10-22 09:02:47,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:47,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:47,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-22 09:02:47,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389516571] [2019-10-22 09:02:47,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045261535] [2019-10-22 09:02:47,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:02:47,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-22 09:02:47,542 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:47,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2019-10-22 09:02:47,542 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950750567] [2019-10-22 09:02:47,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:02:47,543 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:47,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:02:47,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:02:47,543 INFO L87 Difference]: Start difference. First operand 100 states and 148 transitions. Second operand 13 states. [2019-10-22 09:02:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:47,754 INFO L93 Difference]: Finished difference Result 196 states and 315 transitions. [2019-10-22 09:02:47,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:02:47,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2019-10-22 09:02:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:47,756 INFO L225 Difference]: With dead ends: 196 [2019-10-22 09:02:47,756 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 09:02:47,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:02:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 09:02:47,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-22 09:02:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 09:02:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-10-22 09:02:47,761 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 65 [2019-10-22 09:02:47,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:47,762 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-10-22 09:02:47,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:02:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-10-22 09:02:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 09:02:47,763 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:02:47,763 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 09:02:47,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:47,964 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:02:47,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:02:47,964 INFO L82 PathProgramCache]: Analyzing trace with hash 458348847, now seen corresponding path program 2 times [2019-10-22 09:02:47,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:02:47,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665984379] [2019-10-22 09:02:47,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:47,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:02:47,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:02:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:02:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 39 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-22 09:02:48,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665984379] [2019-10-22 09:02:48,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098179304] [2019-10-22 09:02:48,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/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 [2019-10-22 09:02:48,133 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:02:48,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:02:48,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:02:48,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:02:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 34 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-22 09:02:48,215 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:02:48,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2019-10-22 09:02:48,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572865908] [2019-10-22 09:02:48,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:02:48,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:02:48,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:02:48,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:02:48,216 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 15 states. [2019-10-22 09:02:48,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:02:48,350 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2019-10-22 09:02:48,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 09:02:48,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-10-22 09:02:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:02:48,354 INFO L225 Difference]: With dead ends: 82 [2019-10-22 09:02:48,354 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 09:02:48,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:02:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 09:02:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 09:02:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 09:02:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 09:02:48,355 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2019-10-22 09:02:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:02:48,355 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 09:02:48,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:02:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 09:02:48,356 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 09:02:48,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:02:48,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 09:02:48,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 09:02:48,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 09:02:48,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 09:02:48,969 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-10-22 09:02:48,969 INFO L439 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (<= 4 ULTIMATE.start_main_~x~0) [2019-10-22 09:02:48,969 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 4) (<= 4 ULTIMATE.start_main_~x~0)) [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L446 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-10-22 09:02:48,970 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1) .cse0) (and (<= 4 |fibo2_#in~n|) .cse0))) (not (<= |fibo2_#in~n| 2))) [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-10-22 09:02:48,970 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L446 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-10-22 09:02:48,971 INFO L439 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L439 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 4 fibo1_~n) .cse0) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (<= |fibo1_#in~n| 3) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (<= 5 |fibo1_#in~n|))) [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-10-22 09:02:48,971 INFO L443 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-10-22 09:02:48,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:02:48 BoogieIcfgContainer [2019-10-22 09:02:48,984 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:02:48,985 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:02:48,985 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:02:48,985 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:02:48,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:02:40" (3/4) ... [2019-10-22 09:02:48,989 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 09:02:48,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-10-22 09:02:48,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-10-22 09:02:48,999 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 09:02:48,999 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 09:02:49,037 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4ba74b51-d619-415f-95bb-d2178925656e/bin/uautomizer/witness.graphml [2019-10-22 09:02:49,037 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:02:49,039 INFO L168 Benchmark]: Toolchain (without parser) took 8694.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 185.6 MB). Free memory was 949.9 MB in the beginning and 890.3 MB in the end (delta: 59.6 MB). Peak memory consumption was 245.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:49,039 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:02:49,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:49,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.66 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. [2019-10-22 09:02:49,040 INFO L168 Benchmark]: Boogie Preprocessor took 15.25 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. [2019-10-22 09:02:49,040 INFO L168 Benchmark]: RCFGBuilder took 272.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:49,041 INFO L168 Benchmark]: TraceAbstraction took 8096.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.0 MB). Free memory was 1.1 GB in the beginning and 892.3 MB in the end (delta: 226.6 MB). Peak memory consumption was 269.6 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:49,041 INFO L168 Benchmark]: Witness Printer took 52.70 ms. Allocated memory is still 1.2 GB. Free memory was 892.3 MB in the beginning and 890.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:02:49,043 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 228.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -188.7 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.66 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 15.25 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 272.74 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8096.38 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 43.0 MB). Free memory was 1.1 GB in the beginning and 892.3 MB in the end (delta: 226.6 MB). Peak memory consumption was 269.6 MB. Max. memory is 11.5 GB. * Witness Printer took 52.70 ms. Allocated memory is still 1.2 GB. Free memory was 892.3 MB in the beginning and 890.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 8.0s, OverallIterations: 12, TraceHistogramMax: 7, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 304 SDtfs, 410 SDslu, 2142 SDs, 0 SdLazy, 2470 SolverSat, 299 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 817 GetRequests, 637 SyntacticMatches, 8 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=10, 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, 12 MinimizatonAttempts, 88 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 353 PreInvPairs, 458 NumberOfFragments, 88 HoareAnnotationTreeSize, 353 FomulaSimplifications, 1493 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 1703 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1045 NumberOfCodeBlocks, 1045 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 1023 ConstructedInterpolants, 0 QuantifiedInterpolants, 132627 SizeOfPredicates, 36 NumberOfNonLiveVariables, 1159 ConjunctsInSsa, 111 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 865/1218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...