./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b2_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/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 128b2219e8f86913777da69c49be5957c6dd8c80 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:03:54,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:03:54,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:03:54,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:03:54,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:03:54,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:03:54,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:03:54,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:03:54,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:03:54,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:03:54,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:03:54,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:03:54,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:03:54,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:03:54,669 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:03:54,670 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:03:54,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:03:54,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:03:54,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:03:54,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:03:54,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:03:54,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:03:54,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:03:54,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:03:54,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:03:54,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:03:54,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:03:54,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:03:54,692 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:03:54,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:03:54,693 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:03:54,694 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:03:54,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:03:54,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:03:54,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:03:54,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:03:54,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:03:54,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:03:54,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:03:54,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:03:54,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:03:54,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:03:54,735 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:03:54,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:03:54,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:03:54,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:03:54,737 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:03:54,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:03:54,738 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:03:54,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:03:54,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:03:54,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:03:54,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:03:54,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:03:54,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:03:54,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:03:54,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:03:54,742 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:03:54,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:03:54,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:03:54,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:03:54,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:03:54,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:03:54,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:03:54,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:03:54,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:03:54,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:03:54,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:03:54,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:03:54,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:03:54,746 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/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 -> 128b2219e8f86913777da69c49be5957c6dd8c80 [2019-11-16 00:03:54,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:03:54,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:03:54,784 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:03:54,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:03:54,786 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:03:54,787 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_b2_o3.c [2019-11-16 00:03:54,838 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/data/8deafef67/89c6bfaa3a1e42bc943c0c4a3d8d2ae8/FLAG404fac6b9 [2019-11-16 00:03:55,205 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:03:55,205 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/sv-benchmarks/c/recursive-simple/id_b2_o3.c [2019-11-16 00:03:55,209 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/data/8deafef67/89c6bfaa3a1e42bc943c0c4a3d8d2ae8/FLAG404fac6b9 [2019-11-16 00:03:55,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/data/8deafef67/89c6bfaa3a1e42bc943c0c4a3d8d2ae8 [2019-11-16 00:03:55,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:03:55,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:03:55,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:03:55,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:03:55,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:03:55,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf22eb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55, skipping insertion in model container [2019-11-16 00:03:55,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,630 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:03:55,644 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:03:55,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:03:55,831 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:03:55,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:03:55,932 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:03:55,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55 WrapperNode [2019-11-16 00:03:55,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:03:55,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:03:55,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:03:55,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:03:55,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:03:55,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:03:55,966 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:03:55,966 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:03:55,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... [2019-11-16 00:03:55,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:03:55,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:03:55,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:03:55,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:03:55,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:03:56,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:03:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:03:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-16 00:03:56,059 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-16 00:03:56,218 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:03:56,218 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-16 00:03:56,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:56 BoogieIcfgContainer [2019-11-16 00:03:56,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:03:56,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:03:56,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:03:56,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:03:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:03:55" (1/3) ... [2019-11-16 00:03:56,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b2aed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:56, skipping insertion in model container [2019-11-16 00:03:56,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:03:55" (2/3) ... [2019-11-16 00:03:56,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b2aed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:03:56, skipping insertion in model container [2019-11-16 00:03:56,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:56" (3/3) ... [2019-11-16 00:03:56,226 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2019-11-16 00:03:56,235 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:03:56,241 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:03:56,250 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:03:56,271 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:03:56,271 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:03:56,271 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:03:56,271 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:03:56,271 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:03:56,271 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:03:56,271 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:03:56,271 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:03:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-16 00:03:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-16 00:03:56,288 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:03:56,289 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:03:56,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:03:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:03:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1224902363, now seen corresponding path program 1 times [2019-11-16 00:03:56,301 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:03:56,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841165773] [2019-11-16 00:03:56,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:03:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:03:56,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841165773] [2019-11-16 00:03:56,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:03:56,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:03:56,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174410298] [2019-11-16 00:03:56,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:03:56,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:03:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:03:56,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:03:56,556 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2019-11-16 00:03:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:03:56,603 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-11-16 00:03:56,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:03:56,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-16 00:03:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:03:56,613 INFO L225 Difference]: With dead ends: 28 [2019-11-16 00:03:56,613 INFO L226 Difference]: Without dead ends: 15 [2019-11-16 00:03:56,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:03:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-16 00:03:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-16 00:03:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-16 00:03:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-16 00:03:56,647 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-16 00:03:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:03:56,647 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-16 00:03:56,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:03:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-16 00:03:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:03:56,649 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:03:56,649 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:03:56,649 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:03:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:03:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 510739163, now seen corresponding path program 1 times [2019-11-16 00:03:56,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:03:56,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434252455] [2019-11-16 00:03:56,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:03:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:03:56,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434252455] [2019-11-16 00:03:56,805 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:03:56,805 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:03:56,805 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863439517] [2019-11-16 00:03:56,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:03:56,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:03:56,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:03:56,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:03:56,808 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-11-16 00:03:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:03:56,827 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-11-16 00:03:56,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:03:56,828 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-16 00:03:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:03:56,829 INFO L225 Difference]: With dead ends: 21 [2019-11-16 00:03:56,829 INFO L226 Difference]: Without dead ends: 17 [2019-11-16 00:03:56,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:03:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-16 00:03:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-16 00:03:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-16 00:03:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-16 00:03:56,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 16 [2019-11-16 00:03:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:03:56,835 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-16 00:03:56,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:03:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-16 00:03:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-16 00:03:56,836 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:03:56,836 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:03:56,836 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:03:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:03:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 539368314, now seen corresponding path program 1 times [2019-11-16 00:03:56,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:03:56,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629444273] [2019-11-16 00:03:56,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,837 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:56,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:03:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:03:57,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629444273] [2019-11-16 00:03:57,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582304731] [2019-11-16 00:03:57,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-16 00:03:57,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:03:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-16 00:03:57,182 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:03:57,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-16 00:03:57,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586882266] [2019-11-16 00:03:57,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:03:57,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:03:57,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:03:57,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:03:57,184 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 9 states. [2019-11-16 00:03:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:03:57,251 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-11-16 00:03:57,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:03:57,251 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-16 00:03:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:03:57,252 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:03:57,252 INFO L226 Difference]: Without dead ends: 21 [2019-11-16 00:03:57,253 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:03:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-16 00:03:57,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-16 00:03:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-16 00:03:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-16 00:03:57,258 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2019-11-16 00:03:57,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:03:57,258 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-16 00:03:57,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:03:57,259 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-16 00:03:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-16 00:03:57,260 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:03:57,260 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:03:57,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:57,463 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:03:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:03:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash -719196619, now seen corresponding path program 2 times [2019-11-16 00:03:57,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:03:57,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47638918] [2019-11-16 00:03:57,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:57,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:57,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:03:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:03:57,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47638918] [2019-11-16 00:03:57,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126104156] [2019-11-16 00:03:57,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:57,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:03:57,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:03:57,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-16 00:03:57,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:03:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-16 00:03:57,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:03:57,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-16 00:03:57,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818710895] [2019-11-16 00:03:57,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:03:57,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:03:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:03:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:03:57,856 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states. [2019-11-16 00:03:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:03:57,978 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-16 00:03:57,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-16 00:03:57,979 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-16 00:03:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:03:57,980 INFO L225 Difference]: With dead ends: 37 [2019-11-16 00:03:57,980 INFO L226 Difference]: Without dead ends: 25 [2019-11-16 00:03:57,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:03:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-16 00:03:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-16 00:03:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-16 00:03:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-16 00:03:57,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 23 [2019-11-16 00:03:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:03:57,987 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-16 00:03:57,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:03:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-16 00:03:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-16 00:03:57,988 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:03:57,989 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:03:58,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:58,193 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:03:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:03:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash -895116854, now seen corresponding path program 3 times [2019-11-16 00:03:58,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:03:58,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060502162] [2019-11-16 00:03:58,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:58,194 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:03:58,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:03:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:03:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-16 00:03:58,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060502162] [2019-11-16 00:03:58,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810777214] [2019-11-16 00:03:58,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:58,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-16 00:03:58,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:03:58,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-16 00:03:58,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:03:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-16 00:03:58,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-16 00:03:58,532 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-11-16 00:03:58,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217537873] [2019-11-16 00:03:58,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:03:58,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:03:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:03:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:03:58,533 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2019-11-16 00:03:58,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:03:58,551 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-16 00:03:58,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:03:58,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-16 00:03:58,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:03:58,553 INFO L225 Difference]: With dead ends: 23 [2019-11-16 00:03:58,553 INFO L226 Difference]: Without dead ends: 0 [2019-11-16 00:03:58,553 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:03:58,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-16 00:03:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-16 00:03:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-16 00:03:58,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-16 00:03:58,554 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-11-16 00:03:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:03:58,555 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-16 00:03:58,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:03:58,555 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-16 00:03:58,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-16 00:03:58,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:03:58,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-16 00:03:58,778 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-16 00:03:58,778 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L446 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-11-16 00:03:58,779 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 17) no Hoare annotation was computed. [2019-11-16 00:03:58,780 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2019-11-16 00:03:58,780 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2019-11-16 00:03:58,780 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2019-11-16 00:03:58,780 INFO L443 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2019-11-16 00:03:58,780 INFO L446 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2019-11-16 00:03:58,780 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-16 00:03:58,780 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-16 00:03:58,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:03:58 BoogieIcfgContainer [2019-11-16 00:03:58,783 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:03:58,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:03:58,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:03:58,785 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:03:58,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:03:56" (3/4) ... [2019-11-16 00:03:58,789 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-16 00:03:58,799 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-16 00:03:58,802 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-16 00:03:58,802 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-16 00:03:58,858 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f635b992-0142-4b25-95f2-1ed23c6e41c6/bin/uautomizer/witness.graphml [2019-11-16 00:03:58,858 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:03:58,860 INFO L168 Benchmark]: Toolchain (without parser) took 3243.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.7 MB in the beginning and 943.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 150.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:03:58,861 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:03:58,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -198.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-16 00:03:58,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:03:58,862 INFO L168 Benchmark]: Boogie Preprocessor took 17.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:03:58,862 INFO L168 Benchmark]: RCFGBuilder took 236.77 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. [2019-11-16 00:03:58,863 INFO L168 Benchmark]: TraceAbstraction took 2562.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 943.1 MB in the end (delta: 182.6 MB). Peak memory consumption was 182.6 MB. Max. memory is 11.5 GB. [2019-11-16 00:03:58,863 INFO L168 Benchmark]: Witness Printer took 75.10 ms. Allocated memory is still 1.2 GB. Free memory is still 943.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:03:58,865 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 315.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -198.7 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 32.42 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 17.10 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 236.77 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: 17.6 MB). Peak memory consumption was 17.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2562.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 943.1 MB in the end (delta: 182.6 MB). Peak memory consumption was 182.6 MB. Max. memory is 11.5 GB. * Witness Printer took 75.10 ms. Allocated memory is still 1.2 GB. Free memory is still 943.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 9 SDslu, 306 SDs, 0 SdLazy, 113 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 163 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 11367 SizeOfPredicates, 7 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 76/108 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...