./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 0.1.25-f470102 [2019-12-07 12:38:27,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:38:27,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:38:27,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:38:27,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:38:27,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:38:27,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:38:27,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:38:27,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:38:27,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:38:27,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:38:27,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:38:27,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:38:27,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:38:27,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:38:27,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:38:27,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:38:27,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:38:27,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:38:27,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:38:27,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:38:27,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:38:27,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:38:27,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:38:27,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:38:27,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:38:27,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:38:27,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:38:27,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:38:27,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:38:27,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:38:27,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:38:27,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:38:27,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:38:27,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:38:27,242 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:38:27,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:38:27,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:38:27,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:38:27,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:38:27,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:38:27,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 12:38:27,254 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:38:27,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:38:27,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:38:27,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:38:27,255 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 12:38:27,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:38:27,255 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:38:27,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 12:38:27,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:38:27,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 12:38:27,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:38:27,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 12:38:27,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:38:27,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:38:27,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:38:27,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 12:38:27,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:38:27,258 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_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:27,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:38:27,365 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:38:27,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:38:27,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:38:27,370 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:38:27,370 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2019-12-07 12:38:27,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/data/d0cb0ec97/4675348331df4819bd88bbc47e9d6107/FLAGa60b932cc [2019-12-07 12:38:27,780 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:38:27,780 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/sv-benchmarks/c/recursive/Ackermann01-2.c [2019-12-07 12:38:27,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/data/d0cb0ec97/4675348331df4819bd88bbc47e9d6107/FLAGa60b932cc [2019-12-07 12:38:28,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/data/d0cb0ec97/4675348331df4819bd88bbc47e9d6107 [2019-12-07 12:38:28,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:38:28,187 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:38:28,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:38:28,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:38:28,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:38:28,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d3b949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28, skipping insertion in model container [2019-12-07 12:38:28,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:38:28,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:38:28,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:38:28,305 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:38:28,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:38:28,355 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:38:28,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28 WrapperNode [2019-12-07 12:38:28,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:38:28,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:38:28,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:38:28,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:38:28,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:38:28,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:38:28,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:38:28,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:38:28,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... [2019-12-07 12:38:28,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:38:28,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:38:28,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:38:28,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:38:28,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:38:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:38:28,429 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2019-12-07 12:38:28,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2019-12-07 12:38:28,534 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:38:28,534 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 12:38:28,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:38:28 BoogieIcfgContainer [2019-12-07 12:38:28,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:38:28,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:38:28,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:38:28,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:38:28,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:38:28" (1/3) ... [2019-12-07 12:38:28,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd8c759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:38:28, skipping insertion in model container [2019-12-07 12:38:28,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:38:28" (2/3) ... [2019-12-07 12:38:28,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cd8c759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:38:28, skipping insertion in model container [2019-12-07 12:38:28,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:38:28" (3/3) ... [2019-12-07 12:38:28,540 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2019-12-07 12:38:28,546 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:38:28,550 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 12:38:28,557 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 12:38:28,572 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:38:28,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 12:38:28,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:38:28,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:38:28,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:38:28,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:38:28,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:38:28,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:38:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-12-07 12:38:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 12:38:28,586 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:28,587 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:38:28,587 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1260755674, now seen corresponding path program 1 times [2019-12-07 12:38:28,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:28,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504207415] [2019-12-07 12:38:28,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:38:28,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504207415] [2019-12-07 12:38:28,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:38:28,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-12-07 12:38:28,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290981101] [2019-12-07 12:38:28,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 12:38:28,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 12:38:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-12-07 12:38:28,755 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2019-12-07 12:38:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:28,866 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-12-07 12:38:28,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:38:28,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-07 12:38:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:28,876 INFO L225 Difference]: With dead ends: 37 [2019-12-07 12:38:28,876 INFO L226 Difference]: Without dead ends: 21 [2019-12-07 12:38:28,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:38:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-12-07 12:38:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-12-07 12:38:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 12:38:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2019-12-07 12:38:28,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2019-12-07 12:38:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:28,917 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2019-12-07 12:38:28,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 12:38:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2019-12-07 12:38:28,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-07 12:38:28,918 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:28,919 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:38:28,919 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:28,919 INFO L82 PathProgramCache]: Analyzing trace with hash 963920485, now seen corresponding path program 1 times [2019-12-07 12:38:28,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:28,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979458761] [2019-12-07 12:38:28,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:38:29,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979458761] [2019-12-07 12:38:29,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:38:29,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-12-07 12:38:29,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279832531] [2019-12-07 12:38:29,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 12:38:29,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:29,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 12:38:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:38:29,006 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand 8 states. [2019-12-07 12:38:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:29,104 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-12-07 12:38:29,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:38:29,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-12-07 12:38:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:29,105 INFO L225 Difference]: With dead ends: 28 [2019-12-07 12:38:29,105 INFO L226 Difference]: Without dead ends: 24 [2019-12-07 12:38:29,106 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:38:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-12-07 12:38:29,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2019-12-07 12:38:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 12:38:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-12-07 12:38:29,111 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 18 [2019-12-07 12:38:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:29,111 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-12-07 12:38:29,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 12:38:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-12-07 12:38:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-07 12:38:29,112 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:29,112 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:38:29,113 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash -193744714, now seen corresponding path program 1 times [2019-12-07 12:38:29,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:29,113 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113770859] [2019-12-07 12:38:29,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-07 12:38:29,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113770859] [2019-12-07 12:38:29,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774913553] [2019-12-07 12:38:29,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,182 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 12:38:29,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 12:38:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-12-07 12:38:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512583554] [2019-12-07 12:38:29,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:38:29,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:38:29,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-12-07 12:38:29,238 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 10 states. [2019-12-07 12:38:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:29,331 INFO L93 Difference]: Finished difference Result 47 states and 74 transitions. [2019-12-07 12:38:29,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:38:29,332 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-12-07 12:38:29,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:29,333 INFO L225 Difference]: With dead ends: 47 [2019-12-07 12:38:29,333 INFO L226 Difference]: Without dead ends: 29 [2019-12-07 12:38:29,334 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-12-07 12:38:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-07 12:38:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-12-07 12:38:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 12:38:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-12-07 12:38:29,340 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 24 [2019-12-07 12:38:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:29,340 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-12-07 12:38:29,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:38:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-12-07 12:38:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-07 12:38:29,341 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:29,342 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] [2019-12-07 12:38:29,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:29,543 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:29,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:29,543 INFO L82 PathProgramCache]: Analyzing trace with hash 416247163, now seen corresponding path program 1 times [2019-12-07 12:38:29,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:29,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186425935] [2019-12-07 12:38:29,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-12-07 12:38:29,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186425935] [2019-12-07 12:38:29,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333464973] [2019-12-07 12:38:29,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:29,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-07 12:38:29,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 12:38:29,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:29,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-12-07 12:38:29,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900884594] [2019-12-07 12:38:29,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-07 12:38:29,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-07 12:38:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-12-07 12:38:29,751 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 14 states. [2019-12-07 12:38:30,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:30,065 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2019-12-07 12:38:30,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-07 12:38:30,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-12-07 12:38:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:30,069 INFO L225 Difference]: With dead ends: 50 [2019-12-07 12:38:30,069 INFO L226 Difference]: Without dead ends: 46 [2019-12-07 12:38:30,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2019-12-07 12:38:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-07 12:38:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-12-07 12:38:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-07 12:38:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2019-12-07 12:38:30,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 49 transitions. Word has length 31 [2019-12-07 12:38:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:30,081 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 49 transitions. [2019-12-07 12:38:30,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-07 12:38:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 49 transitions. [2019-12-07 12:38:30,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 12:38:30,082 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:30,082 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] [2019-12-07 12:38:30,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:30,283 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:30,284 INFO L82 PathProgramCache]: Analyzing trace with hash -781004688, now seen corresponding path program 2 times [2019-12-07 12:38:30,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:30,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930805538] [2019-12-07 12:38:30,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:30,457 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-12-07 12:38:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930805538] [2019-12-07 12:38:30,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128334750] [2019-12-07 12:38:30,457 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:30,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 12:38:30,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:38:30,485 INFO L264 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 12:38:30,487 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:30,503 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-07 12:38:30,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:30,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2019-12-07 12:38:30,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237304895] [2019-12-07 12:38:30,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-07 12:38:30,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:30,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-07 12:38:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:38:30,504 INFO L87 Difference]: Start difference. First operand 32 states and 49 transitions. Second operand 15 states. [2019-12-07 12:38:30,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:30,789 INFO L93 Difference]: Finished difference Result 61 states and 112 transitions. [2019-12-07 12:38:30,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-07 12:38:30,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-12-07 12:38:30,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:30,792 INFO L225 Difference]: With dead ends: 61 [2019-12-07 12:38:30,792 INFO L226 Difference]: Without dead ends: 57 [2019-12-07 12:38:30,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2019-12-07 12:38:30,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-07 12:38:30,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2019-12-07 12:38:30,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-07 12:38:30,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2019-12-07 12:38:30,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 38 [2019-12-07 12:38:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:30,802 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2019-12-07 12:38:30,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-07 12:38:30,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2019-12-07 12:38:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-07 12:38:30,804 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:30,804 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] [2019-12-07 12:38:31,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:31,005 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:31,005 INFO L82 PathProgramCache]: Analyzing trace with hash 947442768, now seen corresponding path program 3 times [2019-12-07 12:38:31,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:31,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439197516] [2019-12-07 12:38:31,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 12:38:31,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439197516] [2019-12-07 12:38:31,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147293047] [2019-12-07 12:38:31,173 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:31,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-07 12:38:31,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:38:31,198 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 12:38:31,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-12-07 12:38:31,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:31,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-12-07 12:38:31,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878634232] [2019-12-07 12:38:31,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-07 12:38:31,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-07 12:38:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-12-07 12:38:31,307 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 21 states. [2019-12-07 12:38:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:31,609 INFO L93 Difference]: Finished difference Result 80 states and 152 transitions. [2019-12-07 12:38:31,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-07 12:38:31,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2019-12-07 12:38:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:31,610 INFO L225 Difference]: With dead ends: 80 [2019-12-07 12:38:31,610 INFO L226 Difference]: Without dead ends: 52 [2019-12-07 12:38:31,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-12-07 12:38:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-07 12:38:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2019-12-07 12:38:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 12:38:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2019-12-07 12:38:31,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 38 [2019-12-07 12:38:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:31,623 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 71 transitions. [2019-12-07 12:38:31,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-07 12:38:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 71 transitions. [2019-12-07 12:38:31,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-07 12:38:31,627 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:31,627 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] [2019-12-07 12:38:31,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:31,828 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:31,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash 2112206418, now seen corresponding path program 4 times [2019-12-07 12:38:31,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:31,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749876859] [2019-12-07 12:38:31,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-12-07 12:38:32,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749876859] [2019-12-07 12:38:32,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443277954] [2019-12-07 12:38:32,117 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:32,142 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-07 12:38:32,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:38:32,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 12:38:32,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 86 proven. 35 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-12-07 12:38:32,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:32,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 26 [2019-12-07 12:38:32,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908158575] [2019-12-07 12:38:32,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-07 12:38:32,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-07 12:38:32,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-12-07 12:38:32,245 INFO L87 Difference]: Start difference. First operand 42 states and 71 transitions. Second operand 26 states. [2019-12-07 12:38:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:33,123 INFO L93 Difference]: Finished difference Result 147 states and 385 transitions. [2019-12-07 12:38:33,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-07 12:38:33,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2019-12-07 12:38:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:33,126 INFO L225 Difference]: With dead ends: 147 [2019-12-07 12:38:33,126 INFO L226 Difference]: Without dead ends: 109 [2019-12-07 12:38:33,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=2124, Unknown=0, NotChecked=0, Total=2652 [2019-12-07 12:38:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-12-07 12:38:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2019-12-07 12:38:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-07 12:38:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-12-07 12:38:33,142 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 64 [2019-12-07 12:38:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:33,142 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-12-07 12:38:33,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-07 12:38:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-12-07 12:38:33,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-12-07 12:38:33,145 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:38:33,145 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] [2019-12-07 12:38:33,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:33,346 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 12:38:33,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:38:33,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2068462442, now seen corresponding path program 5 times [2019-12-07 12:38:33,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 12:38:33,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776775338] [2019-12-07 12:38:33,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:38:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:38:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 230 proven. 184 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-12-07 12:38:33,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776775338] [2019-12-07 12:38:33,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734691958] [2019-12-07 12:38:33,689 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/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 [2019-12-07 12:38:33,729 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-07 12:38:33,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:38:33,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 12:38:33,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:38:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 333 proven. 114 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2019-12-07 12:38:33,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 12:38:33,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 24 [2019-12-07 12:38:33,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453025258] [2019-12-07 12:38:33,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-07 12:38:33,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 12:38:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-07 12:38:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2019-12-07 12:38:33,777 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 24 states. [2019-12-07 12:38:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:38:34,467 INFO L93 Difference]: Finished difference Result 224 states and 654 transitions. [2019-12-07 12:38:34,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-07 12:38:34,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-12-07 12:38:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:38:34,468 INFO L225 Difference]: With dead ends: 224 [2019-12-07 12:38:34,468 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:38:34,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=533, Invalid=2437, Unknown=0, NotChecked=0, Total=2970 [2019-12-07 12:38:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:38:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:38:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:38:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:38:34,473 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2019-12-07 12:38:34,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:38:34,473 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:38:34,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-07 12:38:34,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:38:34,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:38:34,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:38:34,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-12-07 12:38:35,267 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 25 [2019-12-07 12:38:35,320 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-12-07 12:38:35,320 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-12-07 12:38:35,320 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-12-07 12:38:35,320 INFO L246 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2019-12-07 12:38:35,320 INFO L249 CegarLoopResult]: At program point L26(lines 26 46) the Hoare annotation is: true [2019-12-07 12:38:35,320 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 44) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L44(line 44) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L41(lines 41 45) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L242 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L34(lines 34 39) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point ackermannEXIT(lines 15 23) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L242 CegarLoopResult]: 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))) [2019-12-07 12:38:35,321 INFO L249 CegarLoopResult]: At program point ackermannENTRY(lines 15 23) the Hoare annotation is: true [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L242 CegarLoopResult]: 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))) [2019-12-07 12:38:35,321 INFO L242 CegarLoopResult]: 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)))) [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L22-3(line 22) no Hoare annotation was computed. [2019-12-07 12:38:35,321 INFO L246 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2019-12-07 12:38:35,322 INFO L246 CegarLoopResult]: For program point ackermannFINAL(lines 15 23) no Hoare annotation was computed. [2019-12-07 12:38:35,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:38:35 BoogieIcfgContainer [2019-12-07 12:38:35,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:38:35,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:38:35,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:38:35,328 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:38:35,328 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:38:28" (3/4) ... [2019-12-07 12:38:35,330 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:38:35,335 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2019-12-07 12:38:35,337 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-12-07 12:38:35,338 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-12-07 12:38:35,367 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5304dc08-3bb6-457f-813a-a80ab8a72f09/bin/uautomizer/witness.graphml [2019-12-07 12:38:35,367 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:38:35,368 INFO L168 Benchmark]: Toolchain (without parser) took 7181.92 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.0 MB). Free memory was 946.2 MB in the beginning and 871.5 MB in the end (delta: 74.7 MB). Peak memory consumption was 269.8 MB. Max. memory is 11.5 GB. [2019-12-07 12:38:35,369 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:38:35,369 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-12-07 12:38:35,369 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.26 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. [2019-12-07 12:38:35,370 INFO L168 Benchmark]: Boogie Preprocessor took 11.66 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-12-07 12:38:35,370 INFO L168 Benchmark]: RCFGBuilder took 145.97 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. [2019-12-07 12:38:35,371 INFO L168 Benchmark]: TraceAbstraction took 6791.67 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 873.8 MB in the end (delta: 229.1 MB). Peak memory consumption was 298.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:38:35,371 INFO L168 Benchmark]: Witness Printer took 39.66 ms. Allocated memory is still 1.2 GB. Free memory was 873.8 MB in the beginning and 871.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:38:35,374 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 961.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 168.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 125.8 MB). Free memory was 946.2 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 21.26 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 11.66 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 145.97 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 6791.67 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 69.2 MB). Free memory was 1.1 GB in the beginning and 873.8 MB in the end (delta: 229.1 MB). Peak memory consumption was 298.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.66 ms. Allocated memory is still 1.2 GB. Free memory was 873.8 MB in the beginning and 871.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 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: 6.1s, OverallIterations: 8, TraceHistogramMax: 17, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, HoareTripleCheckerStatistics: 145 SDtfs, 330 SDslu, 779 SDs, 0 SdLazy, 2723 SolverSat, 688 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 614 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 2.1s 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: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 234 PreInvPairs, 377 NumberOfFragments, 88 HoareAnnotationTreeSize, 234 FomulaSimplifications, 52561 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 6 FomulaSimplificationsInter, 2314 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s 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...