./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 .................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:24:28,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:28,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:28,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:28,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:28,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:28,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:28,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:28,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:28,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:28,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:28,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:28,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:28,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:28,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:28,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:28,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:28,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:28,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:28,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:28,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:28,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:28,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:28,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:28,299 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:28,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:28,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:28,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:28,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:28,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:28,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:28,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:28,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:28,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:28,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:28,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:28,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:28,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:28,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:28,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:28,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:28,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:24:28,327 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:28,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:28,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:28,331 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:28,331 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:28,331 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:28,331 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:24:28,332 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:28,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:28,332 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:24:28,332 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:24:28,332 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:28,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:28,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:28,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:24:28,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:28,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:28,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:28,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:28,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:28,334 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:28,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:28,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:28,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:28,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:28,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:28,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:28,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:28,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:28,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:28,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:28,336 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:24:28,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:24:28,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:28,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:28,337 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan 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 -> Taipan 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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2019-10-22 11:24:28,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:28,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:28,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:28,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:28,380 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:28,380 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-10-22 11:24:28,432 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/91b35dc71/5f4786ad12eb4b3f8e9292ae05e31736/FLAGb90a7a057 [2019-10-22 11:24:28,815 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:28,815 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-10-22 11:24:28,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/91b35dc71/5f4786ad12eb4b3f8e9292ae05e31736/FLAGb90a7a057 [2019-10-22 11:24:29,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/91b35dc71/5f4786ad12eb4b3f8e9292ae05e31736 [2019-10-22 11:24:29,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:29,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:29,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:29,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:29,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:29,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ce6504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29, skipping insertion in model container [2019-10-22 11:24:29,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,230 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:29,249 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:29,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:29,421 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:29,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:29,509 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:29,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29 WrapperNode [2019-10-22 11:24:29,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:29,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:29,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:29,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:29,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,541 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:29,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:29,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:29,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:29,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... [2019-10-22 11:24:29,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:29,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:29,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:29,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:29,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:29,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 11:24:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 11:24:29,747 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:29,747 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:24:29,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:29 BoogieIcfgContainer [2019-10-22 11:24:29,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:29,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:29,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:29,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:29,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:29" (1/3) ... [2019-10-22 11:24:29,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62470ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:29, skipping insertion in model container [2019-10-22 11:24:29,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:29" (2/3) ... [2019-10-22 11:24:29,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62470ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:29, skipping insertion in model container [2019-10-22 11:24:29,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:29" (3/3) ... [2019-10-22 11:24:29,755 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2019-10-22 11:24:29,764 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:29,771 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:29,782 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:29,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:29,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:29,806 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:29,806 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:29,806 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:29,806 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:29,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:29,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 11:24:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:24:29,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:29,833 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:29,835 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-10-22 11:24:29,849 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:29,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823458160] [2019-10-22 11:24:29,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:29,849 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:29,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:30,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823458160] [2019-10-22 11:24:30,023 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:30,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:24:30,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740014422] [2019-10-22 11:24:30,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:24:30,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:24:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:24:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:24:30,048 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-22 11:24:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:30,256 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-10-22 11:24:30,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:24:30,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:24:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:30,268 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:24:30,268 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:24:30,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:24:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:24:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:24:30,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:24:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:24:30,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-10-22 11:24:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:30,313 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:24:30,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:24:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:24:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:24:30,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:30,315 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:30,315 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:30,315 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-10-22 11:24:30,316 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:30,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688203363] [2019-10-22 11:24:30,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,316 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:30,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688203363] [2019-10-22 11:24:30,371 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:30,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:24:30,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479567506] [2019-10-22 11:24:30,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:24:30,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:24:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:24:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:24:30,374 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-10-22 11:24:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:30,465 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-10-22 11:24:30,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:24:30,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-10-22 11:24:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:30,466 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:24:30,466 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:24:30,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-22 11:24:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:24:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 11:24:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:24:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:24:30,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-10-22 11:24:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:30,473 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:24:30,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:24:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:24:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:24:30,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:30,474 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:30,474 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-10-22 11:24:30,475 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:30,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469593461] [2019-10-22 11:24:30,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:30,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:24:30,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469593461] [2019-10-22 11:24:30,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157601625] [2019-10-22 11:24:30,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:30,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:30,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:24:30,763 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:30,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:24:30,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1448071617] [2019-10-22 11:24:30,965 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 23 [2019-10-22 11:24:30,999 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:24:30,999 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:24:31,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:31,256 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inappropriate decl info IMPLEMENTATION at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.getBoogieVar(NonrelationalStatementProcessor.java:348) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.handleHavocStatement(NonrelationalStatementProcessor.java:325) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.processStatement(NonrelationalStatementProcessor.java:159) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:138) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalStatementProcessor.process(NonrelationalStatementProcessor.java:107) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:422) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.handleInternalTransition(NonrelationalPostOperator.java:413) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:140) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.nonrelational.NonrelationalPostOperator.apply(NonrelationalPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.applyInternally(CompoundDomainPostOperator.java:306) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:131) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.compound.CompoundDomainPostOperator.apply(CompoundDomainPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormanCachedPostOperation.restoreOriginalStateVariables(PoormanCachedPostOperation.java:322) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.applyPost(PoormansAbstractPostOperator.java:217) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:120) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.domain.transformula.poorman.PoormansAbstractPostOperator.apply(PoormansAbstractPostOperator.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.lambda$17(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.mapCollection(DisjunctiveAbstractState.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.absint.DisjunctiveAbstractState.apply(DisjunctiveAbstractState.java:323) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateAbstractPost(FixpointEngine.java:249) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.calculateFixpoint(FixpointEngine.java:134) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.algorithm.FixpointEngine.run(FixpointEngine.java:105) at de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2.tool.AbstractInterpreter.runWithoutTimeoutAndResults(AbstractInterpreter.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-10-22 11:24:31,265 INFO L168 Benchmark]: Toolchain (without parser) took 2047.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -82.5 MB). Peak memory consumption was 85.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,269 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:31,276 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,278 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.43 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. [2019-10-22 11:24:31,281 INFO L168 Benchmark]: Boogie Preprocessor took 17.07 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. [2019-10-22 11:24:31,281 INFO L168 Benchmark]: RCFGBuilder took 189.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,282 INFO L168 Benchmark]: TraceAbstraction took 1514.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 116.8 MB). Peak memory consumption was 116.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:31,284 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 944.5 MB in the beginning and 1.2 GB in the end (delta: -216.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.43 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 17.07 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 189.98 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1514.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 116.8 MB). Peak memory consumption was 116.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inappropriate decl info IMPLEMENTATION de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inappropriate decl info IMPLEMENTATION: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Boogie2SmtSymbolTable.getBoogieVar(Boogie2SmtSymbolTable.java:222) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:24:33,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:33,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:33,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:33,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:33,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:33,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:33,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:33,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:33,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:33,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:33,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:33,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:33,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:33,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:33,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:33,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:33,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:33,385 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:33,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:33,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:33,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:33,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:33,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:33,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:33,394 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:33,394 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:33,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:33,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:33,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:33,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:33,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:33,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:33,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:33,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:33,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:33,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:33,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:33,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:33,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:33,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:33,404 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:24:33,416 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:33,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:33,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:33,417 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:33,417 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:33,417 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:33,417 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:33,418 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:33,418 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:33,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:33,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:24:33,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:33,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:33,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:33,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:33,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:33,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:33,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:33,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:33,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:33,422 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:24:33,422 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:24:33,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:33,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:33,423 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan 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 -> Taipan 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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2019-10-22 11:24:33,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:33,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:33,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:33,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:33,467 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:33,468 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-10-22 11:24:33,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/fa4ff4f7a/778ba04835824a16a12aeb82f351bd66/FLAG83b2e0e1e [2019-10-22 11:24:33,952 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:33,953 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-10-22 11:24:33,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/fa4ff4f7a/778ba04835824a16a12aeb82f351bd66/FLAG83b2e0e1e [2019-10-22 11:24:34,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/data/fa4ff4f7a/778ba04835824a16a12aeb82f351bd66 [2019-10-22 11:24:34,294 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:34,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:34,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:34,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:34,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:34,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358b1a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,311 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:34,324 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:34,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:34,477 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:34,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:34,508 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:34,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34 WrapperNode [2019-10-22 11:24:34,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:34,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:34,510 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:34,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:34,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:34,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:34,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:34,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:34,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... [2019-10-22 11:24:34,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:34,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:34,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:34,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:34,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:34,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:34,673 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 11:24:34,673 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 11:24:34,800 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:34,801 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:24:34,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34 BoogieIcfgContainer [2019-10-22 11:24:34,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:34,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:34,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:34,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:34,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:34" (1/3) ... [2019-10-22 11:24:34,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781f0d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:34" (2/3) ... [2019-10-22 11:24:34,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@781f0d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:34, skipping insertion in model container [2019-10-22 11:24:34,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34" (3/3) ... [2019-10-22 11:24:34,810 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2019-10-22 11:24:34,819 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:34,827 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:24:34,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:24:34,855 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:34,855 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:34,855 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:34,855 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:34,855 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:34,856 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:34,856 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:34,856 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 11:24:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:24:34,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:34,879 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:34,880 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1543686946, now seen corresponding path program 1 times [2019-10-22 11:24:34,897 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:34,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [818102582] [2019-10-22 11:24:34,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:34,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:24:34,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,050 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:24:35,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [818102582] [2019-10-22 11:24:35,188 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:35,188 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:24:35,188 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755172116] [2019-10-22 11:24:35,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:24:35,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:24:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:24:35,205 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2019-10-22 11:24:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:35,272 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-10-22 11:24:35,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:24:35,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 11:24:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:35,284 INFO L225 Difference]: With dead ends: 36 [2019-10-22 11:24:35,284 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 11:24:35,287 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:24:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 11:24:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-10-22 11:24:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 11:24:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-10-22 11:24:35,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-10-22 11:24:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:35,327 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-10-22 11:24:35,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:24:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-10-22 11:24:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:24:35,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:35,329 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:35,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:35,530 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash -120079710, now seen corresponding path program 1 times [2019-10-22 11:24:35,530 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:35,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1466063498] [2019-10-22 11:24:35,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:35,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:35,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:35,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-22 11:24:35,648 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-22 11:24:35,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1466063498] [2019-10-22 11:24:35,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 11:24:35,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2019-10-22 11:24:35,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591545892] [2019-10-22 11:24:35,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:24:35,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:24:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:24:35,934 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 7 states. [2019-10-22 11:24:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:35,965 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-10-22 11:24:35,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:24:35,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-22 11:24:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:35,968 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:24:35,968 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:24:35,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:24:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:24:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-10-22 11:24:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:24:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-10-22 11:24:35,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 21 [2019-10-22 11:24:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:35,977 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-10-22 11:24:35,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:24:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-10-22 11:24:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:24:35,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:35,979 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:36,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:36,180 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 844306575, now seen corresponding path program 1 times [2019-10-22 11:24:36,181 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:36,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:24:36,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:36,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:36,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:24:36,253 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:36,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:24:36,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060944138] [2019-10-22 11:24:36,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860173837] [2019-10-22 11:24:36,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:36,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:36,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:24:36,455 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:36,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:24:36,573 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:36,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:24:36,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734697828] [2019-10-22 11:24:36,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:24:36,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:24:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:24:36,575 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2019-10-22 11:24:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:36,674 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-10-22 11:24:36,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:24:36,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-22 11:24:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:36,676 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:24:36,676 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:24:36,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:24:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 11:24:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:24:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2019-10-22 11:24:36,684 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 22 [2019-10-22 11:24:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:36,684 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2019-10-22 11:24:36,685 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:24:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2019-10-22 11:24:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:24:36,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:36,687 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:37,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:37,088 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash 571748771, now seen corresponding path program 2 times [2019-10-22 11:24:37,088 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:37,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2090426361] [2019-10-22 11:24:37,089 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:37,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:37,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:37,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:37,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:24:37,151 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:37,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:24:37,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2090426361] [2019-10-22 11:24:37,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55944951] [2019-10-22 11:24:37,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:37,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:37,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:37,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:37,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-22 11:24:37,320 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:37,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 11:24:37,418 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:37,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:24:37,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695924907] [2019-10-22 11:24:37,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:24:37,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:24:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:24:37,420 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 9 states. [2019-10-22 11:24:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:37,541 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-10-22 11:24:37,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:24:37,542 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-22 11:24:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:37,543 INFO L225 Difference]: With dead ends: 48 [2019-10-22 11:24:37,544 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:24:37,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:37,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:24:37,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-22 11:24:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 11:24:37,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2019-10-22 11:24:37,552 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 22 [2019-10-22 11:24:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:37,552 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2019-10-22 11:24:37,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:24:37,553 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2019-10-22 11:24:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:24:37,559 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:37,559 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:37,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:37,961 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -705043475, now seen corresponding path program 3 times [2019-10-22 11:24:37,961 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:37,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1070797867] [2019-10-22 11:24:37,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:38,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:24:38,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:38,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:24:38,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-22 11:24:38,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-22 11:24:38,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070797867] [2019-10-22 11:24:38,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262911775] [2019-10-22 11:24:38,349 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:38,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:24:38,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:38,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:24:38,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-22 11:24:38,402 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-22 11:24:38,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:38,614 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2019-10-22 11:24:38,614 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512175663] [2019-10-22 11:24:38,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:24:38,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:38,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:24:38,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:38,616 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand 11 states. [2019-10-22 11:24:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:38,856 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2019-10-22 11:24:38,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:24:38,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-22 11:24:38,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:38,860 INFO L225 Difference]: With dead ends: 77 [2019-10-22 11:24:38,860 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 11:24:38,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:24:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 11:24:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-10-22 11:24:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-22 11:24:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 92 transitions. [2019-10-22 11:24:38,880 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 92 transitions. Word has length 34 [2019-10-22 11:24:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:38,880 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 92 transitions. [2019-10-22 11:24:38,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:24:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 92 transitions. [2019-10-22 11:24:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:24:38,882 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:38,882 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:39,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:39,283 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2100747161, now seen corresponding path program 4 times [2019-10-22 11:24:39,284 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:39,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1713507208] [2019-10-22 11:24:39,284 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:39,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:24:39,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:39,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:39,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 11:24:39,362 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:39,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:39,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-22 11:24:39,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1713507208] [2019-10-22 11:24:39,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377486495] [2019-10-22 11:24:39,552 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:39,583 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:24:39,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:39,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:39,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-22 11:24:39,591 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:39,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:39,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-22 11:24:39,753 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:39,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9] total 11 [2019-10-22 11:24:39,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813287692] [2019-10-22 11:24:39,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:24:39,754 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:24:39,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:39,755 INFO L87 Difference]: Start difference. First operand 46 states and 92 transitions. Second operand 11 states. [2019-10-22 11:24:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:39,907 INFO L93 Difference]: Finished difference Result 95 states and 230 transitions. [2019-10-22 11:24:39,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:24:39,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-22 11:24:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:39,911 INFO L225 Difference]: With dead ends: 95 [2019-10-22 11:24:39,913 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 11:24:39,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:24:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 11:24:39,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 11:24:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 11:24:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 95 transitions. [2019-10-22 11:24:39,935 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 95 transitions. Word has length 34 [2019-10-22 11:24:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:39,935 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 95 transitions. [2019-10-22 11:24:39,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:24:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 95 transitions. [2019-10-22 11:24:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-22 11:24:39,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:39,937 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:40,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:40,338 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1503930969, now seen corresponding path program 5 times [2019-10-22 11:24:40,338 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:40,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [99319773] [2019-10-22 11:24:40,338 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:40,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-10-22 11:24:40,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:40,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:40,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-22 11:24:40,448 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-10-22 11:24:40,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [99319773] [2019-10-22 11:24:40,930 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 11:24:40,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2019-10-22 11:24:40,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918214998] [2019-10-22 11:24:40,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:24:40,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:24:40,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:24:40,931 INFO L87 Difference]: Start difference. First operand 50 states and 95 transitions. Second operand 6 states. [2019-10-22 11:24:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:41,044 INFO L93 Difference]: Finished difference Result 84 states and 171 transitions. [2019-10-22 11:24:41,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:24:41,046 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-22 11:24:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:41,046 INFO L225 Difference]: With dead ends: 84 [2019-10-22 11:24:41,047 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:24:41,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:24:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:24:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:24:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:24:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2019-10-22 11:24:41,056 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 46 [2019-10-22 11:24:41,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:41,056 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2019-10-22 11:24:41,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:24:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2019-10-22 11:24:41,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-22 11:24:41,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:41,058 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:41,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:41,264 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1974214584, now seen corresponding path program 6 times [2019-10-22 11:24:41,264 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:41,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [127793530] [2019-10-22 11:24:41,265 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:41,320 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-22 11:24:41,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:41,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:41,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-22 11:24:41,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:41,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:41,541 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-22 11:24:41,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [127793530] [2019-10-22 11:24:41,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271622098] [2019-10-22 11:24:41,541 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:41,576 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-22 11:24:41,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:41,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:24:41,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-22 11:24:41,582 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:41,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-22 11:24:41,737 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:41,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:24:41,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886155700] [2019-10-22 11:24:41,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:24:41,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:24:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:24:41,739 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand 9 states. [2019-10-22 11:24:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:41,866 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-10-22 11:24:41,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:24:41,868 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-22 11:24:41,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:41,869 INFO L225 Difference]: With dead ends: 40 [2019-10-22 11:24:41,869 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:24:41,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:24:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:24:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:24:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:24:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2019-10-22 11:24:41,878 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 47 [2019-10-22 11:24:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:41,879 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2019-10-22 11:24:41,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:24:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2019-10-22 11:24:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-22 11:24:41,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:41,881 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 10, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:42,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:42,282 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1709057054, now seen corresponding path program 7 times [2019-10-22 11:24:42,283 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:42,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1814109083] [2019-10-22 11:24:42,283 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:42,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:24:42,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-22 11:24:42,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:42,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:42,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:42,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-22 11:24:42,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814109083] [2019-10-22 11:24:42,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846206991] [2019-10-22 11:24:42,782 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:42,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:24:42,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 150 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-22 11:24:42,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:43,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:43,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:43,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 27 proven. 165 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-22 11:24:43,108 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:43,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11] total 13 [2019-10-22 11:24:43,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241932624] [2019-10-22 11:24:43,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 11:24:43,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:43,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 11:24:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:24:43,109 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 13 states. [2019-10-22 11:24:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:43,292 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2019-10-22 11:24:43,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:24:43,293 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2019-10-22 11:24:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:43,294 INFO L225 Difference]: With dead ends: 81 [2019-10-22 11:24:43,295 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 11:24:43,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-22 11:24:43,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 11:24:43,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-22 11:24:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 11:24:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2019-10-22 11:24:43,302 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 85 [2019-10-22 11:24:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:43,303 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2019-10-22 11:24:43,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 11:24:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2019-10-22 11:24:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-22 11:24:43,304 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:43,304 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:43,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:43,705 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1736681501, now seen corresponding path program 8 times [2019-10-22 11:24:43,706 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:43,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [726035526] [2019-10-22 11:24:43,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:43,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:43,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:43,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 11:24:43,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 212 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2019-10-22 11:24:43,854 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:44,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 41 proven. 238 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-22 11:24:44,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [726035526] [2019-10-22 11:24:44,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203346942] [2019-10-22 11:24:44,325 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:44,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:24:44,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:44,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:24:44,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 132 proven. 40 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-10-22 11:24:44,434 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:44,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 132 proven. 48 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2019-10-22 11:24:44,667 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:44,667 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 7, 9] total 15 [2019-10-22 11:24:44,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887799963] [2019-10-22 11:24:44,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:24:44,668 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:24:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:24:44,669 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand 15 states. [2019-10-22 11:24:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:44,935 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2019-10-22 11:24:44,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 11:24:44,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2019-10-22 11:24:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:44,939 INFO L225 Difference]: With dead ends: 101 [2019-10-22 11:24:44,939 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 11:24:44,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 372 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2019-10-22 11:24:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 11:24:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2019-10-22 11:24:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 11:24:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 78 transitions. [2019-10-22 11:24:44,949 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 78 transitions. Word has length 98 [2019-10-22 11:24:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:44,950 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 78 transitions. [2019-10-22 11:24:44,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:24:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 78 transitions. [2019-10-22 11:24:44,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-22 11:24:44,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:44,953 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 26, 16, 16, 16, 16, 16, 16, 10, 7, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:45,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:45,354 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2027827852, now seen corresponding path program 9 times [2019-10-22 11:24:45,354 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:45,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1614642352] [2019-10-22 11:24:45,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:45,572 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-22 11:24:45,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:45,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:24:45,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2797 backedges. 627 proven. 67 refuted. 0 times theorem prover too weak. 2103 trivial. 0 not checked. [2019-10-22 11:24:45,643 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:46,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:46,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2797 backedges. 611 proven. 59 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2019-10-22 11:24:46,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614642352] [2019-10-22 11:24:46,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942387642] [2019-10-22 11:24:46,303 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:46,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-22 11:24:46,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:46,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:24:46,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2797 backedges. 627 proven. 67 refuted. 0 times theorem prover too weak. 2103 trivial. 0 not checked. [2019-10-22 11:24:46,634 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:47,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:47,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2797 backedges. 611 proven. 59 refuted. 0 times theorem prover too weak. 2127 trivial. 0 not checked. [2019-10-22 11:24:47,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:47,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 11] total 15 [2019-10-22 11:24:47,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549163650] [2019-10-22 11:24:47,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:24:47,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:24:47,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:24:47,316 INFO L87 Difference]: Start difference. First operand 52 states and 78 transitions. Second operand 15 states. [2019-10-22 11:24:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:47,761 INFO L93 Difference]: Finished difference Result 110 states and 185 transitions. [2019-10-22 11:24:47,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 11:24:47,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 211 [2019-10-22 11:24:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:47,764 INFO L225 Difference]: With dead ends: 110 [2019-10-22 11:24:47,764 INFO L226 Difference]: Without dead ends: 58 [2019-10-22 11:24:47,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 819 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:24:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-22 11:24:47,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-22 11:24:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-22 11:24:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 80 transitions. [2019-10-22 11:24:47,772 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 80 transitions. Word has length 211 [2019-10-22 11:24:47,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:47,773 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 80 transitions. [2019-10-22 11:24:47,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:24:47,773 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2019-10-22 11:24:47,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-22 11:24:47,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:47,775 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:48,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:48,176 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1246259682, now seen corresponding path program 10 times [2019-10-22 11:24:48,176 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:48,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [393394212] [2019-10-22 11:24:48,176 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:48,358 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:24:48,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:48,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:24:48,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2019-10-22 11:24:48,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:48,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:48,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,121 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-22 11:24:49,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [393394212] [2019-10-22 11:24:49,208 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790588634] [2019-10-22 11:24:49,209 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:49,397 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:24:49,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:49,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:24:49,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:49,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 492 refuted. 0 times theorem prover too weak. 1007 trivial. 0 not checked. [2019-10-22 11:24:49,426 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:49,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 89 proven. 532 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-22 11:24:49,953 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:49,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 10, 15] total 17 [2019-10-22 11:24:49,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059118654] [2019-10-22 11:24:49,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 11:24:49,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 11:24:49,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-10-22 11:24:49,954 INFO L87 Difference]: Start difference. First operand 58 states and 80 transitions. Second operand 17 states. [2019-10-22 11:24:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:50,270 INFO L93 Difference]: Finished difference Result 126 states and 217 transitions. [2019-10-22 11:24:50,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 11:24:50,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 161 [2019-10-22 11:24:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:50,272 INFO L225 Difference]: With dead ends: 126 [2019-10-22 11:24:50,272 INFO L226 Difference]: Without dead ends: 70 [2019-10-22 11:24:50,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2019-10-22 11:24:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-22 11:24:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2019-10-22 11:24:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-22 11:24:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-10-22 11:24:50,287 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 161 [2019-10-22 11:24:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:50,288 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-10-22 11:24:50,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 11:24:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2019-10-22 11:24:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2019-10-22 11:24:50,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:50,297 INFO L380 BasicCegarLoop]: trace histogram [51, 51, 41, 25, 25, 25, 25, 25, 25, 16, 10, 1, 1, 1, 1, 1, 1] [2019-10-22 11:24:50,698 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:50,698 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:24:50,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:50,698 INFO L82 PathProgramCache]: Analyzing trace with hash 593594274, now seen corresponding path program 11 times [2019-10-22 11:24:50,699 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:24:50,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [947950863] [2019-10-22 11:24:50,699 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:24:51,285 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-10-22 11:24:51,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:51,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 11:24:51,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 1189 proven. 1152 refuted. 0 times theorem prover too weak. 4479 trivial. 0 not checked. [2019-10-22 11:24:51,791 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:53,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:53,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:54,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:54,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:54,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:54,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:54,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:54,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:54,547 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:54,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:54,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:55,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-22 11:24:56,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:56,022 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:56,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:56,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:56,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:56,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:56,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:24:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 1193 proven. 1240 refuted. 0 times theorem prover too weak. 4387 trivial. 0 not checked. [2019-10-22 11:24:56,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [947950863] [2019-10-22 11:24:56,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631858256] [2019-10-22 11:24:56,376 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:24:56,781 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-10-22 11:24:56,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:24:56,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 11:24:56,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:24:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 1185 proven. 1170 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2019-10-22 11:24:56,956 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:24:57,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:57,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:57,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:57,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:57,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:57,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:57,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:58,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 6 terms [2019-10-22 11:24:58,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:58,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-22 11:24:58,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:58,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-22 11:24:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6820 backedges. 1213 proven. 1280 refuted. 0 times theorem prover too weak. 4327 trivial. 0 not checked. [2019-10-22 11:24:59,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:24:59,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19, 10, 17] total 25 [2019-10-22 11:24:59,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321562159] [2019-10-22 11:24:59,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 11:24:59,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:24:59,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 11:24:59,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:24:59,126 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 25 states. [2019-10-22 11:25:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:01,504 INFO L93 Difference]: Finished difference Result 143 states and 273 transitions. [2019-10-22 11:25:01,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 11:25:01,505 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 325 [2019-10-22 11:25:01,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:01,506 INFO L225 Difference]: With dead ends: 143 [2019-10-22 11:25:01,506 INFO L226 Difference]: Without dead ends: 89 [2019-10-22 11:25:01,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1237 SyntacticMatches, 36 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=320, Invalid=940, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 11:25:01,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-22 11:25:01,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2019-10-22 11:25:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-22 11:25:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 103 transitions. [2019-10-22 11:25:01,521 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 103 transitions. Word has length 325 [2019-10-22 11:25:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:01,521 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 103 transitions. [2019-10-22 11:25:01,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 11:25:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 103 transitions. [2019-10-22 11:25:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-22 11:25:01,525 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:01,525 INFO L380 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:01,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:01,926 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:01,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:01,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1054422439, now seen corresponding path program 12 times [2019-10-22 11:25:01,926 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:01,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1391603242] [2019-10-22 11:25:01,927 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:02,525 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-10-22 11:25:02,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:25:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:02,857 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:25:02,857 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:25:03,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:03,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:03 BoogieIcfgContainer [2019-10-22 11:25:03,105 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:03,105 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:03,105 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:03,105 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:03,106 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:34" (3/4) ... [2019-10-22 11:25:03,107 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:25:03,172 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e57e981a-cfb2-4bb4-ac0a-c203ddf6e9d3/bin/utaipan/witness.graphml [2019-10-22 11:25:03,172 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:03,174 INFO L168 Benchmark]: Toolchain (without parser) took 28877.83 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 456.1 MB). Free memory was 952.3 MB in the beginning and 1.3 GB in the end (delta: -324.9 MB). Peak memory consumption was 131.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,174 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:03,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.30 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,174 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:03,175 INFO L168 Benchmark]: Boogie Preprocessor took 74.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -223.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,175 INFO L168 Benchmark]: RCFGBuilder took 180.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,175 INFO L168 Benchmark]: TraceAbstraction took 28302.02 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 286.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -141.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,176 INFO L168 Benchmark]: Witness Printer took 66.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:03,177 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 977.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 212.30 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 74.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.3 MB). Free memory was 941.6 MB in the beginning and 1.2 GB in the end (delta: -223.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 180.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28302.02 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 286.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -141.4 MB). Peak memory consumption was 145.3 MB. Max. memory is 11.5 GB. * Witness Printer took 66.81 ms. Allocated memory is still 1.5 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 7; [L25] CALL, EXPR fibo(x) VAL [\old(n)=7] [L6] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L8] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=6] [L6] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L8] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=6, fibo(n-1)=5, n=6] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=6, fibo(n-1)=5, fibo(n-2)=3, n=6] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=7, fibo(n-1)=8, n=7] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=7, fibo(n-1)=8, fibo(n-2)=5, n=7] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 13 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 28.2s, OverallIterations: 14, TraceHistogramMax: 51, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 394 SDslu, 816 SDs, 0 SdLazy, 2096 SolverSat, 511 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4328 GetRequests, 4077 SyntacticMatches, 58 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=13, 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, 13 MinimizatonAttempts, 56 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 14.7s InterpolantComputationTime, 2416 NumberOfCodeBlocks, 2095 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 4262 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528075 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2596 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 46 InterpolantComputations, 4 PerfectInterpolantSequences, 41190/49730 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...