./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 c2f1e635c5c806286d01eb0b8ff07448b8253a7a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:52:16,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:52:16,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:52:16,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:52:16,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:52:16,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:52:16,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:52:16,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:52:16,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:52:16,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:52:16,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:52:16,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:52:16,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:52:16,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:52:16,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:52:16,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:52:16,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:52:16,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:52:16,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:52:16,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:52:16,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:52:16,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:52:17,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:52:17,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:52:17,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:52:17,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:52:17,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:52:17,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:52:17,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:52:17,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:52:17,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:52:17,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:52:17,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:52:17,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:52:17,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:52:17,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:52:17,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:52:17,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:52:17,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:52:17,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:52:17,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:52:17,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:52:17,028 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:52:17,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:52:17,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:52:17,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:52:17,030 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:52:17,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:52:17,030 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:52:17,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:52:17,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:52:17,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:52:17,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:52:17,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:52:17,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:52:17,032 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:52:17,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:52:17,032 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:52:17,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:52:17,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:52:17,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:52:17,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:52:17,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:52:17,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:52:17,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:52:17,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:52:17,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:52:17,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:52:17,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:52:17,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:52:17,035 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_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 -> c2f1e635c5c806286d01eb0b8ff07448b8253a7a [2019-11-25 08:52:17,167 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:52:17,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:52:17,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:52:17,180 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:52:17,181 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:52:17,181 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-25 08:52:17,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/data/c652f3cb3/d86dc325d55844db8314d7e1cbd54e4d/FLAG69d3b8f6b [2019-11-25 08:52:17,597 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:52:17,598 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/sv-benchmarks/c/recursive/Ackermann01-2.c [2019-11-25 08:52:17,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/data/c652f3cb3/d86dc325d55844db8314d7e1cbd54e4d/FLAG69d3b8f6b [2019-11-25 08:52:17,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/data/c652f3cb3/d86dc325d55844db8314d7e1cbd54e4d [2019-11-25 08:52:17,613 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:52:17,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:52:17,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:17,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:52:17,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:52:17,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69519b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17, skipping insertion in model container [2019-11-25 08:52:17,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:52:17,643 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:52:17,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:17,816 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:52:17,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:17,945 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:52:17,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17 WrapperNode [2019-11-25 08:52:17,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:17,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:17,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:52:17,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:52:17,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:17,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:52:17,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:52:17,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:52:17,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... [2019-11-25 08:52:17,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:52:17,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:52:17,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:52:17,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:52:17,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 [2019-11-25 08:52:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:52:18,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:52:18,041 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-11-25 08:52:18,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-11-25 08:52:18,217 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:52:18,217 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:52:18,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:18 BoogieIcfgContainer [2019-11-25 08:52:18,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:52:18,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:52:18,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:52:18,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:52:18,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:52:17" (1/3) ... [2019-11-25 08:52:18,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cb7598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:18, skipping insertion in model container [2019-11-25 08:52:18,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:17" (2/3) ... [2019-11-25 08:52:18,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74cb7598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:18, skipping insertion in model container [2019-11-25 08:52:18,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:18" (3/3) ... [2019-11-25 08:52:18,225 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2019-11-25 08:52:18,233 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:52:18,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:52:18,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:52:18,268 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:52:18,268 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:52:18,268 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:52:18,268 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:52:18,268 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:52:18,268 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:52:18,269 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:52:18,269 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:52:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-25 08:52:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:52:18,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:18,289 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:18,290 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:18,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-11-25 08:52:18,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:18,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718333004] [2019-11-25 08:52:18,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:18,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718333004] [2019-11-25 08:52:18,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:18,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-25 08:52:18,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667963628] [2019-11-25 08:52:18,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:52:18,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:52:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:52:18,643 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2019-11-25 08:52:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:18,819 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-25 08:52:18,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:18,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-11-25 08:52:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:18,829 INFO L225 Difference]: With dead ends: 37 [2019-11-25 08:52:18,829 INFO L226 Difference]: Without dead ends: 21 [2019-11-25 08:52:18,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-25 08:52:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-25 08:52:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-25 08:52:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-11-25 08:52:18,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2019-11-25 08:52:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:18,870 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-11-25 08:52:18,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:52:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-11-25 08:52:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-25 08:52:18,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:18,872 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:18,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-11-25 08:52:18,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:18,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082273380] [2019-11-25 08:52:18,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:52:19,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082273380] [2019-11-25 08:52:19,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:19,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-25 08:52:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944644242] [2019-11-25 08:52:19,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:52:19,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:52:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:52:19,050 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 8 states. [2019-11-25 08:52:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:19,221 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-25 08:52:19,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:52:19,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-25 08:52:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:19,223 INFO L225 Difference]: With dead ends: 28 [2019-11-25 08:52:19,223 INFO L226 Difference]: Without dead ends: 24 [2019-11-25 08:52:19,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:52:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-25 08:52:19,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-11-25 08:52:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-25 08:52:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-11-25 08:52:19,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 18 [2019-11-25 08:52:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:19,232 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-11-25 08:52:19,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:52:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-11-25 08:52:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-25 08:52:19,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:19,234 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:19,234 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash -193744714, now seen corresponding path program 1 times [2019-11-25 08:52:19,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:19,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609257292] [2019-11-25 08:52:19,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-25 08:52:19,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609257292] [2019-11-25 08:52:19,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670956870] [2019-11-25 08:52:19,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 [2019-11-25 08:52:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:52:19,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-25 08:52:19,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:19,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-11-25 08:52:19,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998071922] [2019-11-25 08:52:19,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:52:19,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:52:19,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:19,444 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 10 states. [2019-11-25 08:52:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:19,618 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2019-11-25 08:52:19,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:52:19,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-11-25 08:52:19,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:19,621 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:52:19,621 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:52:19,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:52:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:52:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-25 08:52:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-25 08:52:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-25 08:52:19,631 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 24 [2019-11-25 08:52:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:19,632 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-25 08:52:19,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:52:19,632 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-25 08:52:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-25 08:52:19,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:19,634 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:19,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:19,837 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:19,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash 416247163, now seen corresponding path program 1 times [2019-11-25 08:52:19,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:19,838 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537840075] [2019-11-25 08:52:19,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-25 08:52:20,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537840075] [2019-11-25 08:52:20,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885070908] [2019-11-25 08:52:20,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 [2019-11-25 08:52:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:20,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:52:20,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:20,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:20,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-11-25 08:52:20,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778423502] [2019-11-25 08:52:20,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:52:20,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:20,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:52:20,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:52:20,218 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 14 states. [2019-11-25 08:52:20,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:20,825 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2019-11-25 08:52:20,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:52:20,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-25 08:52:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:20,829 INFO L225 Difference]: With dead ends: 50 [2019-11-25 08:52:20,829 INFO L226 Difference]: Without dead ends: 46 [2019-11-25 08:52:20,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:52:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-25 08:52:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-11-25 08:52:20,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-25 08:52:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2019-11-25 08:52:20,845 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 31 [2019-11-25 08:52:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:20,845 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2019-11-25 08:52:20,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:52:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2019-11-25 08:52:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-25 08:52:20,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:20,847 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:21,048 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:21,048 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 2 times [2019-11-25 08:52:21,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:21,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269318701] [2019-11-25 08:52:21,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-25 08:52:21,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269318701] [2019-11-25 08:52:21,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744778513] [2019-11-25 08:52:21,320 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/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 [2019-11-25 08:52:21,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:21,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:21,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:21,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-25 08:52:21,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:21,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-11-25 08:52:21,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506951488] [2019-11-25 08:52:21,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:52:21,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:52:21,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:52:21,419 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand 15 states. [2019-11-25 08:52:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:21,894 INFO L93 Difference]: Finished difference Result 61 states and 112 transitions. [2019-11-25 08:52:21,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-25 08:52:21,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-11-25 08:52:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:21,898 INFO L225 Difference]: With dead ends: 61 [2019-11-25 08:52:21,898 INFO L226 Difference]: Without dead ends: 57 [2019-11-25 08:52:21,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2019-11-25 08:52:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-25 08:52:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2019-11-25 08:52:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:52:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2019-11-25 08:52:21,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 38 [2019-11-25 08:52:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:21,933 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2019-11-25 08:52:21,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:52:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2019-11-25 08:52:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-25 08:52:21,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:21,938 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:22,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:22,142 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:22,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:22,142 INFO L82 PathProgramCache]: Analyzing trace with hash 947442768, now seen corresponding path program 3 times [2019-11-25 08:52:22,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:22,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212952622] [2019-11-25 08:52:22,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:22,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212952622] [2019-11-25 08:52:22,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343253995] [2019-11-25 08:52:22,397 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:22,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-25 08:52:22,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:22,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:52:22,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-25 08:52:22,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:22,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-11-25 08:52:22,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451612562] [2019-11-25 08:52:22,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:52:22,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:52:22,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:52:22,583 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 21 states. [2019-11-25 08:52:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:23,069 INFO L93 Difference]: Finished difference Result 80 states and 152 transitions. [2019-11-25 08:52:23,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-25 08:52:23,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2019-11-25 08:52:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:23,073 INFO L225 Difference]: With dead ends: 80 [2019-11-25 08:52:23,073 INFO L226 Difference]: Without dead ends: 52 [2019-11-25 08:52:23,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-25 08:52:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-25 08:52:23,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2019-11-25 08:52:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:52:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2019-11-25 08:52:23,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 38 [2019-11-25 08:52:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:23,087 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 71 transitions. [2019-11-25 08:52:23,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:52:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 71 transitions. [2019-11-25 08:52:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-25 08:52:23,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:23,099 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:23,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:23,302 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2112206418, now seen corresponding path program 4 times [2019-11-25 08:52:23,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:23,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577603441] [2019-11-25 08:52:23,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-25 08:52:23,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577603441] [2019-11-25 08:52:23,763 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278961363] [2019-11-25 08:52:23,763 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:23,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:52:23,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:23,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:52:23,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 86 proven. 35 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-25 08:52:23,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:23,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2019-11-25 08:52:23,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249483434] [2019-11-25 08:52:23,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-25 08:52:23,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-25 08:52:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-11-25 08:52:23,998 INFO L87 Difference]: Start difference. First operand 42 states and 71 transitions. Second operand 26 states. [2019-11-25 08:52:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:25,341 INFO L93 Difference]: Finished difference Result 147 states and 385 transitions. [2019-11-25 08:52:25,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-25 08:52:25,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2019-11-25 08:52:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:25,346 INFO L225 Difference]: With dead ends: 147 [2019-11-25 08:52:25,346 INFO L226 Difference]: Without dead ends: 109 [2019-11-25 08:52:25,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=2124, Unknown=0, NotChecked=0, Total=2652 [2019-11-25 08:52:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-25 08:52:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2019-11-25 08:52:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-25 08:52:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-11-25 08:52:25,371 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 64 [2019-11-25 08:52:25,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:25,371 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-11-25 08:52:25,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-25 08:52:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-11-25 08:52:25,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-25 08:52:25,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:25,377 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:25,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:25,580 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2068462442, now seen corresponding path program 5 times [2019-11-25 08:52:25,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:25,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519035630] [2019-11-25 08:52:25,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:25,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 230 proven. 184 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-25 08:52:26,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519035630] [2019-11-25 08:52:26,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039978193] [2019-11-25 08:52:26,091 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:26,157 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-25 08:52:26,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:26,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:26,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 333 proven. 114 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-11-25 08:52:26,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:26,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 24 [2019-11-25 08:52:26,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614004871] [2019-11-25 08:52:26,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-25 08:52:26,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-25 08:52:26,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:52:26,241 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 24 states. [2019-11-25 08:52:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:27,381 INFO L93 Difference]: Finished difference Result 224 states and 654 transitions. [2019-11-25 08:52:27,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-25 08:52:27,381 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-11-25 08:52:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:27,382 INFO L225 Difference]: With dead ends: 224 [2019-11-25 08:52:27,382 INFO L226 Difference]: Without dead ends: 0 [2019-11-25 08:52:27,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2019-11-25 08:52:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-25 08:52:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-25 08:52:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-25 08:52:27,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-25 08:52:27,387 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2019-11-25 08:52:27,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:27,387 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:52:27,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-25 08:52:27,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:52:27,388 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-25 08:52:27,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:27,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-25 08:52:28,600 WARN L192 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2019-11-25 08:52:28,692 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-25 08:52:28,692 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-25 08:52:28,692 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-25 08:52:28,692 INFO L444 ceAbstractionStarter]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-11-25 08:52:28,692 INFO L447 ceAbstractionStarter]: At program point L26(lines 26 46) the Hoare annotation is: true [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point L44(line 44) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point L41(lines 41 45) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L440 ceAbstractionStarter]: At program point L40(line 40) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point L40-1(line 40) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point L34(lines 34 39) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L444 ceAbstractionStarter]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2019-11-25 08:52:28,693 INFO L440 ceAbstractionStarter]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= ackermann_~m 0))) [2019-11-25 08:52:28,694 INFO L447 ceAbstractionStarter]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-11-25 08:52:28,694 INFO L440 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= ackermann_~m 0))) [2019-11-25 08:52:28,694 INFO L440 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse1 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= ackermann_~n |ackermann_#in~n|)) (.cse3 (not (= ackermann_~m 0)))) (let ((.cse0 (and (<= 3 |ackermann_#t~ret1|) .cse1 .cse2 .cse3))) (and (<= 0 |ackermann_#in~m|) (not (<= |ackermann_#in~n| 0)) (or .cse0 (and .cse1 .cse2 (<= |ackermann_#in~m| 1) .cse3 (<= 2 |ackermann_#t~ret1|))) (or (<= |ackermann_#in~n| 1) .cse0)))) [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point L19(lines 19 21) no Hoare annotation was computed. [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-11-25 08:52:28,694 INFO L444 ceAbstractionStarter]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2019-11-25 08:52:28,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:52:28 BoogieIcfgContainer [2019-11-25 08:52:28,701 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:52:28,702 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:52:28,702 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:52:28,702 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:52:28,702 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:18" (3/4) ... [2019-11-25 08:52:28,705 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-25 08:52:28,711 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2019-11-25 08:52:28,717 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-25 08:52:28,717 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-25 08:52:28,775 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2a08779c-fabe-4e34-a81e-a83d34347f2f/bin/uautomizer/witness.graphml [2019-11-25 08:52:28,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:52:28,776 INFO L168 Benchmark]: Toolchain (without parser) took 11161.84 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 336.6 MB). Free memory was 948.7 MB in the beginning and 970.6 MB in the end (delta: -21.9 MB). Peak memory consumption was 314.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:28,776 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. [2019-11-25 08:52:28,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -229.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:28,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:28,777 INFO L168 Benchmark]: Boogie Preprocessor took 15.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:28,778 INFO L168 Benchmark]: RCFGBuilder took 228.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:28,778 INFO L168 Benchmark]: TraceAbstraction took 10482.10 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 149.4 MB). Free memory was 1.2 GB in the beginning and 982.1 MB in the end (delta: 175.4 MB). Peak memory consumption was 324.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:28,778 INFO L168 Benchmark]: Witness Printer took 73.45 ms. Allocated memory is still 1.4 GB. Free memory was 982.1 MB in the beginning and 970.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:28,780 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 331.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 948.7 MB in the beginning and 1.2 GB in the end (delta: -229.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.96 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.44 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 228.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 21.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10482.10 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 149.4 MB). Free memory was 1.2 GB in the beginning and 982.1 MB in the end (delta: 175.4 MB). Peak memory consumption was 324.8 MB. Max. memory is 11.5 GB. * Witness Printer took 73.45 ms. Allocated memory is still 1.4 GB. Free memory was 982.1 MB in the beginning and 970.6 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 44]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Result: SAFE, OverallTime: 10.4s, OverallIterations: 8, TraceHistogramMax: 17, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, HoareTripleCheckerStatistics: 145 SDtfs, 330 SDslu, 779 SDs, 0 SdLazy, 2774 SolverSat, 679 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 234 PreInvPairs, 377 NumberOfFragments, 88 HoareAnnotationTreeSize, 234 FomulaSimplifications, 52561 FormulaSimplificationTreeSizeReduction, 0.6s HoareSimplificationTime, 6 FomulaSimplificationsInter, 2314 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 653 NumberOfCodeBlocks, 601 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 639 ConstructedInterpolants, 0 QuantifiedInterpolants, 95043 SizeOfPredicates, 26 NumberOfNonLiveVariables, 785 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1472/1916 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...