./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04.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_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 d3562c726fb0df5872bc6ae08c11ec0d40862c19 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:49,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:49,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:49,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:49,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:49,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:49,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:49,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:49,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:49,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:49,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:49,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:49,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:49,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:49,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:49,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:49,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:49,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:49,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:49,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:49,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:49,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:49,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:49,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:49,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:49,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:49,654 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:49,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:49,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:49,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:49,657 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:49,658 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:49,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:49,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:49,659 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:49,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:49,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:49,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:49,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:49,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:49,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:49,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:49,683 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:49,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:49,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:49,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:49,685 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:49,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:49,685 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:49,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:49,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:49,686 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:49,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:49,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:49,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:49,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:49,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:49,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:49,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:49,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:49,688 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_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2019-10-22 08:57:49,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:49,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:49,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:49,733 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:49,733 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:49,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 08:57:49,774 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/data/a3da06c0a/1901cfce016c4e449c48d6ffe83074e1/FLAGb742b0688 [2019-10-22 08:57:50,172 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:50,172 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/sv-benchmarks/c/recursive/Fibonacci04.c [2019-10-22 08:57:50,177 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/data/a3da06c0a/1901cfce016c4e449c48d6ffe83074e1/FLAGb742b0688 [2019-10-22 08:57:50,582 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/data/a3da06c0a/1901cfce016c4e449c48d6ffe83074e1 [2019-10-22 08:57:50,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:50,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:50,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:50,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:50,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:50,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314722d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50, skipping insertion in model container [2019-10-22 08:57:50,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:50,616 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:50,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:50,783 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:50,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:50,872 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:50,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50 WrapperNode [2019-10-22 08:57:50,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:50,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:50,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:50,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:50,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,888 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:50,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:50,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:50,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:50,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... [2019-10-22 08:57:50,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:50,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:50,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:50,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:50,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:50,997 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-10-22 08:57:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-10-22 08:57:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:51,163 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:51,163 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:57:51,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:51 BoogieIcfgContainer [2019-10-22 08:57:51,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:51,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:51,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:51,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:50" (1/3) ... [2019-10-22 08:57:51,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678ab3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:51, skipping insertion in model container [2019-10-22 08:57:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:50" (2/3) ... [2019-10-22 08:57:51,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@678ab3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:51, skipping insertion in model container [2019-10-22 08:57:51,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:51" (3/3) ... [2019-10-22 08:57:51,171 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci04.c [2019-10-22 08:57:51,180 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:51,187 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:51,196 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:51,217 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:51,217 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:51,217 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:51,217 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:51,218 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:51,218 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:51,218 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:51,218 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 08:57:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:51,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:51,240 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:51,242 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:51,247 INFO L82 PathProgramCache]: Analyzing trace with hash 238562696, now seen corresponding path program 1 times [2019-10-22 08:57:51,256 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:51,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086771788] [2019-10-22 08:57:51,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,512 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 08:57:51,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086771788] [2019-10-22 08:57:51,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:51,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:51,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873802960] [2019-10-22 08:57:51,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:51,518 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:51,531 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-10-22 08:57:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:51,603 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-10-22 08:57:51,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:51,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:57:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:51,611 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:57:51,611 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:57:51,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 08:57:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:57:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:57:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:57:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 08:57:51,651 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-10-22 08:57:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:51,651 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 08:57:51,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 08:57:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 08:57:51,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:51,653 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:51,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash -497654578, now seen corresponding path program 1 times [2019-10-22 08:57:51,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:51,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185519807] [2019-10-22 08:57:51,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,654 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,692 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 08:57:51,692 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185519807] [2019-10-22 08:57:51,692 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:51,693 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:51,693 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51231577] [2019-10-22 08:57:51,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:51,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:51,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:51,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:51,695 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 5 states. [2019-10-22 08:57:51,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:51,739 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-10-22 08:57:51,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:51,740 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-22 08:57:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:51,741 INFO L225 Difference]: With dead ends: 23 [2019-10-22 08:57:51,741 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:57:51,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 08:57:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:57:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 08:57:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:57:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 08:57:51,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-10-22 08:57:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:51,747 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 08:57:51,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 08:57:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 08:57:51,748 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:51,748 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:51,748 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:51,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:51,748 INFO L82 PathProgramCache]: Analyzing trace with hash -850570499, now seen corresponding path program 1 times [2019-10-22 08:57:51,749 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:51,749 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157118644] [2019-10-22 08:57:51,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,749 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:51,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:57:51,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157118644] [2019-10-22 08:57:51,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077278915] [2019-10-22 08:57:51,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:51,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:51,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 08:57:51,965 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:51,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-10-22 08:57:51,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771467548] [2019-10-22 08:57:51,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:57:51,966 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:57:51,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:51,967 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 9 states. [2019-10-22 08:57:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:52,072 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-10-22 08:57:52,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:57:52,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-22 08:57:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:52,073 INFO L225 Difference]: With dead ends: 34 [2019-10-22 08:57:52,073 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 08:57:52,074 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:57:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 08:57:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-22 08:57:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:57:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-10-22 08:57:52,078 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 22 [2019-10-22 08:57:52,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:52,079 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-10-22 08:57:52,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:57:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-10-22 08:57:52,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-22 08:57:52,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:52,080 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:52,280 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:52,281 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1834230885, now seen corresponding path program 1 times [2019-10-22 08:57:52,281 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:52,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214808458] [2019-10-22 08:57:52,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:52,282 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:52,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:57:52,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214808458] [2019-10-22 08:57:52,391 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21921609] [2019-10-22 08:57:52,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:52,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 08:57:52,442 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:52,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-22 08:57:52,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302290179] [2019-10-22 08:57:52,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 08:57:52,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:52,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:57:52,444 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 8 states. [2019-10-22 08:57:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:52,527 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2019-10-22 08:57:52,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:57:52,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-22 08:57:52,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:52,529 INFO L225 Difference]: With dead ends: 37 [2019-10-22 08:57:52,529 INFO L226 Difference]: Without dead ends: 33 [2019-10-22 08:57:52,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:57:52,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-22 08:57:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-22 08:57:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-22 08:57:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2019-10-22 08:57:52,537 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 23 [2019-10-22 08:57:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:52,537 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2019-10-22 08:57:52,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 08:57:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2019-10-22 08:57:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-22 08:57:52,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:52,539 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:52,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:52,739 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1301134080, now seen corresponding path program 2 times [2019-10-22 08:57:52,740 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:52,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166169535] [2019-10-22 08:57:52,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:52,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:52,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-22 08:57:52,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166169535] [2019-10-22 08:57:52,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716117515] [2019-10-22 08:57:52,865 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:52,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:57:52,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:52,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:52,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 08:57:52,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:52,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-10-22 08:57:52,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92157555] [2019-10-22 08:57:52,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 08:57:52,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:52,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 08:57:52,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-22 08:57:52,963 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand 14 states. [2019-10-22 08:57:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:53,213 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2019-10-22 08:57:53,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 08:57:53,213 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-10-22 08:57:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:53,215 INFO L225 Difference]: With dead ends: 67 [2019-10-22 08:57:53,215 INFO L226 Difference]: Without dead ends: 34 [2019-10-22 08:57:53,216 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-22 08:57:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-22 08:57:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-22 08:57:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 08:57:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2019-10-22 08:57:53,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 36 [2019-10-22 08:57:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:53,224 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2019-10-22 08:57:53,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 08:57:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2019-10-22 08:57:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-22 08:57:53,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:53,228 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:53,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:53,429 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash -181993491, now seen corresponding path program 3 times [2019-10-22 08:57:53,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:53,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19557913] [2019-10-22 08:57:53,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:53,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:53,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 80 proven. 101 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-22 08:57:53,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19557913] [2019-10-22 08:57:53,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648772091] [2019-10-22 08:57:53,895 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:53,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-22 08:57:53,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:53,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:53,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-10-22 08:57:54,021 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:54,022 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 18 [2019-10-22 08:57:54,022 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795710026] [2019-10-22 08:57:54,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 08:57:54,024 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 08:57:54,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:57:54,025 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 18 states. [2019-10-22 08:57:54,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:54,377 INFO L93 Difference]: Finished difference Result 80 states and 114 transitions. [2019-10-22 08:57:54,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 08:57:54,378 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2019-10-22 08:57:54,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:54,380 INFO L225 Difference]: With dead ends: 80 [2019-10-22 08:57:54,380 INFO L226 Difference]: Without dead ends: 46 [2019-10-22 08:57:54,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:57:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-22 08:57:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-10-22 08:57:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-22 08:57:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2019-10-22 08:57:54,392 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 78 [2019-10-22 08:57:54,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:54,393 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2019-10-22 08:57:54,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 08:57:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2019-10-22 08:57:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-22 08:57:54,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:54,396 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:54,597 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:54,597 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2106103662, now seen corresponding path program 4 times [2019-10-22 08:57:54,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:54,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483419786] [2019-10-22 08:57:54,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:54,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:54,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 309 proven. 340 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2019-10-22 08:57:55,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483419786] [2019-10-22 08:57:55,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822908168] [2019-10-22 08:57:55,136 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/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 08:57:55,188 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:57:55,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:57:55,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 08:57:55,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 276 proven. 112 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2019-10-22 08:57:55,297 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:57:55,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 24 [2019-10-22 08:57:55,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210365582] [2019-10-22 08:57:55,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-22 08:57:55,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-22 08:57:55,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:57:55,299 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 24 states. [2019-10-22 08:57:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:55,756 INFO L93 Difference]: Finished difference Result 113 states and 194 transitions. [2019-10-22 08:57:55,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 08:57:55,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2019-10-22 08:57:55,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:55,758 INFO L225 Difference]: With dead ends: 113 [2019-10-22 08:57:55,758 INFO L226 Difference]: Without dead ends: 54 [2019-10-22 08:57:55,759 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2019-10-22 08:57:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-22 08:57:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-10-22 08:57:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-22 08:57:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2019-10-22 08:57:55,766 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 146 [2019-10-22 08:57:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:55,767 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2019-10-22 08:57:55,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-22 08:57:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2019-10-22 08:57:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-22 08:57:55,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:55,768 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:55,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:55,969 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1483723059, now seen corresponding path program 5 times [2019-10-22 08:57:55,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:55,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442069592] [2019-10-22 08:57:55,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:55,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:56,010 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:56,010 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:57:56,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:57:56 BoogieIcfgContainer [2019-10-22 08:57:56,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:57:56,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:56,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:56,041 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:56,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:51" (3/4) ... [2019-10-22 08:57:56,044 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:57:56,092 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_f3fc15fe-b8f2-4281-a3cd-c08dc319667b/bin/uautomizer/witness.graphml [2019-10-22 08:57:56,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:56,094 INFO L168 Benchmark]: Toolchain (without parser) took 5508.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 948.8 MB in the beginning and 881.7 MB in the end (delta: 67.1 MB). Peak memory consumption was 258.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,094 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:56,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 948.8 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,095 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:56,095 INFO L168 Benchmark]: Boogie Preprocessor took 28.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,096 INFO L168 Benchmark]: RCFGBuilder took 224.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,096 INFO L168 Benchmark]: TraceAbstraction took 4875.45 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 892.4 MB in the end (delta: 196.2 MB). Peak memory consumption was 273.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,096 INFO L168 Benchmark]: Witness Printer took 51.43 ms. Allocated memory is still 1.2 GB. Free memory was 892.4 MB in the beginning and 881.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:56,099 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 287.05 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 114.3 MB). Free memory was 948.8 MB in the beginning and 1.1 GB in the end (delta: -159.9 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.39 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.77 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 224.75 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4875.45 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 892.4 MB in the end (delta: 196.2 MB). Peak memory consumption was 273.8 MB. Max. memory is 11.5 GB. * Witness Printer took 51.43 ms. Allocated memory is still 1.2 GB. Free memory was 892.4 MB in the beginning and 881.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 4.8s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 242 SDslu, 415 SDs, 0 SdLazy, 929 SolverSat, 266 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 492 GetRequests, 394 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 734 NumberOfCodeBlocks, 702 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 617 ConstructedInterpolants, 0 QuantifiedInterpolants, 113107 SizeOfPredicates, 19 NumberOfNonLiveVariables, 616 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2364/3048 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...