./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.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_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 .................................................................................................................................................................................................................................................................................................................................................................. 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_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:25:06,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:06,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:06,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:06,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:06,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:06,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:06,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:06,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:06,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:06,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:06,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:06,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:06,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:06,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:06,151 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:06,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:06,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:06,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:06,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:06,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:06,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:06,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:06,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:06,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:06,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:06,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:06,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:06,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:06,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:06,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:06,164 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:06,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:06,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:06,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:06,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:06,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:06,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:06,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:06,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:06,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:06,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:25:06,185 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:06,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:06,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:06,188 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:06,188 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:06,188 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:06,188 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:25:06,188 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:06,189 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:06,189 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:25:06,189 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:25:06,189 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:06,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:06,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:06,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:06,191 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:06,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:06,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:06,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:06,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:06,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:06,192 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:25:06,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:25:06,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:06,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:06,193 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_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-10-22 11:25:06,216 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:06,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:06,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:06,229 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:06,230 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:06,230 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 11:25:06,277 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/b4dff1566/19795c58bd5b4516bb37ba65aff3b2f4/FLAG80f95770f [2019-10-22 11:25:06,646 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:06,647 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 11:25:06,653 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/b4dff1566/19795c58bd5b4516bb37ba65aff3b2f4/FLAG80f95770f [2019-10-22 11:25:07,058 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/b4dff1566/19795c58bd5b4516bb37ba65aff3b2f4 [2019-10-22 11:25:07,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:07,063 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:07,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:07,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:07,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:07,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f8b3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07, skipping insertion in model container [2019-10-22 11:25:07,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,080 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:07,095 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:07,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:07,214 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:07,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:07,291 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:07,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07 WrapperNode [2019-10-22 11:25:07,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:07,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:07,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:07,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:07,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:07,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:07,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:07,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:07,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... [2019-10-22 11:25:07,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:07,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:07,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:07,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:07,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:07,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 11:25:07,395 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 11:25:07,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:07,589 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:07,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:07 BoogieIcfgContainer [2019-10-22 11:25:07,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:07,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:07,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:07,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:07,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:07" (1/3) ... [2019-10-22 11:25:07,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46514d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:07, skipping insertion in model container [2019-10-22 11:25:07,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:07" (2/3) ... [2019-10-22 11:25:07,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46514d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:07, skipping insertion in model container [2019-10-22 11:25:07,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:07" (3/3) ... [2019-10-22 11:25:07,601 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-10-22 11:25:07,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:07,624 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:07,645 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:07,667 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:07,668 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:07,668 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:07,668 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:07,668 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:07,668 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:07,668 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:07,668 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:07,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-22 11:25:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:07,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:07,687 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:07,689 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1007516703, now seen corresponding path program 1 times [2019-10-22 11:25:07,699 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:07,700 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773852012] [2019-10-22 11:25:07,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:07,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:07,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:07,858 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 11:25:07,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773852012] [2019-10-22 11:25:07,859 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:07,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:25:07,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911039943] [2019-10-22 11:25:07,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:07,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:07,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:07,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:07,877 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 7 states. [2019-10-22 11:25:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:08,012 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-10-22 11:25:08,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:08,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 11:25:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:08,024 INFO L225 Difference]: With dead ends: 33 [2019-10-22 11:25:08,025 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 11:25:08,028 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 11:25:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 11:25:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 11:25:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:25:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:25:08,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2019-10-22 11:25:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:08,068 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:25:08,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:25:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 11:25:08,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:08,070 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:08,071 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash -453503986, now seen corresponding path program 1 times [2019-10-22 11:25:08,071 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:08,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369674699] [2019-10-22 11:25:08,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:08,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:08,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:08,119 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 11:25:08,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369674699] [2019-10-22 11:25:08,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:08,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 11:25:08,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771208576] [2019-10-22 11:25:08,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:08,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:25:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:25:08,122 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 7 states. [2019-10-22 11:25:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:08,230 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2019-10-22 11:25:08,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:08,232 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-10-22 11:25:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:08,232 INFO L225 Difference]: With dead ends: 23 [2019-10-22 11:25:08,232 INFO L226 Difference]: Without dead ends: 19 [2019-10-22 11:25:08,233 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 11:25:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-22 11:25:08,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-10-22 11:25:08,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 11:25:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-10-22 11:25:08,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2019-10-22 11:25:08,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:08,240 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-10-22 11:25:08,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-10-22 11:25:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:25:08,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:08,242 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 11:25:08,242 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash 511906889, now seen corresponding path program 1 times [2019-10-22 11:25:08,242 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:25:08,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681604056] [2019-10-22 11:25:08,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:08,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:25:08,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:25:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:08,371 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 11:25:08,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681604056] [2019-10-22 11:25:08,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648557552] [2019-10-22 11:25:08,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:08,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:08,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:08,492 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 11:25:08,493 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:08,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:08,676 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 11:25:08,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [902046973] [2019-10-22 11:25:08,683 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 23 [2019-10-22 11:25:08,718 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2019-10-22 11:25:08,719 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-22 11:25:08,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:25:08,988 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 11:25:08,995 INFO L168 Benchmark]: Toolchain (without parser) took 1929.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -60.3 MB). Peak memory consumption was 82.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:08,995 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:08,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:08,997 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:08,997 INFO L168 Benchmark]: Boogie Preprocessor took 16.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:08,997 INFO L168 Benchmark]: RCFGBuilder took 258.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:08,998 INFO L168 Benchmark]: TraceAbstraction took 1396.21 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: 114.2 MB). Peak memory consumption was 114.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:09,001 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 227.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.77 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 258.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1396.21 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: 114.2 MB). Peak memory consumption was 114.2 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 11:25:10,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:25:10,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:25:10,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:25:10,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:25:10,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:25:10,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:25:10,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:25:10,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:25:10,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:25:10,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:25:10,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:25:10,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:25:10,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:25:10,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:25:10,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:25:10,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:25:10,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:25:10,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:25:10,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:25:10,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:25:11,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:25:11,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:25:11,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:25:11,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:25:11,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:25:11,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:25:11,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:25:11,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:25:11,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:25:11,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:25:11,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:25:11,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:25:11,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:25:11,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:25:11,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:25:11,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:25:11,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:25:11,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:25:11,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:25:11,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:25:11,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:25:11,025 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:25:11,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:25:11,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:25:11,026 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:25:11,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:25:11,027 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:25:11,027 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:25:11,027 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:25:11,027 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:25:11,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:25:11,028 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:25:11,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:25:11,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:25:11,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:25:11,029 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:25:11,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:25:11,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:25:11,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:25:11,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:25:11,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:25:11,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:25:11,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:25:11,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:25:11,031 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:25:11,031 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:25:11,032 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:25:11,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:25:11,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:25:11,032 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_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-10-22 11:25:11,059 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:25:11,070 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:25:11,073 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:25:11,074 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:25:11,074 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:25:11,075 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 11:25:11,119 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/61649308d/5ce9bdaa6b58491eaf922bad2f4dbebc/FLAGe85547b71 [2019-10-22 11:25:11,518 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:25:11,519 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-10-22 11:25:11,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/61649308d/5ce9bdaa6b58491eaf922bad2f4dbebc/FLAGe85547b71 [2019-10-22 11:25:11,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/data/61649308d/5ce9bdaa6b58491eaf922bad2f4dbebc [2019-10-22 11:25:11,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:25:11,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:25:11,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:11,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:25:11,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:25:11,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bce39f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11, skipping insertion in model container [2019-10-22 11:25:11,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,556 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:25:11,570 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:25:11,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:11,707 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:25:11,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:25:11,732 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:25:11,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11 WrapperNode [2019-10-22 11:25:11,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:25:11,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:11,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:25:11,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:25:11,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:25:11,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:25:11,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:25:11,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:25:11,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,875 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... [2019-10-22 11:25:11,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:25:11,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:25:11,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:25:11,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:25:11,879 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:11,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:25:11,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:25:11,935 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-10-22 11:25:11,935 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-10-22 11:25:12,107 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:25:12,108 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:25:12,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:12 BoogieIcfgContainer [2019-10-22 11:25:12,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:25:12,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:25:12,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:25:12,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:25:12,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:25:11" (1/3) ... [2019-10-22 11:25:12,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa6ef03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:12, skipping insertion in model container [2019-10-22 11:25:12,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:25:11" (2/3) ... [2019-10-22 11:25:12,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa6ef03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:25:12, skipping insertion in model container [2019-10-22 11:25:12,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:12" (3/3) ... [2019-10-22 11:25:12,127 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2019-10-22 11:25:12,144 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:25:12,150 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:25:12,161 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:25:12,208 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:25:12,208 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:25:12,208 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:25:12,208 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:25:12,208 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:25:12,208 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:25:12,208 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:25:12,209 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:25:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-22 11:25:12,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 11:25:12,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:12,231 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:12,233 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:12,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1543686946, now seen corresponding path program 1 times [2019-10-22 11:25:12,255 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:12,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1699769985] [2019-10-22 11:25:12,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:12,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 11:25:12,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:12,359 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 11:25:12,359 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:12,422 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 11:25:12,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699769985] [2019-10-22 11:25:12,423 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:25:12,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-22 11:25:12,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468537763] [2019-10-22 11:25:12,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 11:25:12,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:12,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 11:25:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:12,440 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2019-10-22 11:25:12,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:12,502 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-10-22 11:25:12,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:25:12,503 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2019-10-22 11:25:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:12,512 INFO L225 Difference]: With dead ends: 36 [2019-10-22 11:25:12,512 INFO L226 Difference]: Without dead ends: 18 [2019-10-22 11:25:12,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:25:12,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-22 11:25:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2019-10-22 11:25:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-22 11:25:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-10-22 11:25:12,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2019-10-22 11:25:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:12,552 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-10-22 11:25:12,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 11:25:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-10-22 11:25:12,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-22 11:25:12,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:12,554 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:25:12,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:12,755 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:12,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash -120079710, now seen corresponding path program 1 times [2019-10-22 11:25:12,756 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:12,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1324108571] [2019-10-22 11:25:12,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:12,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:12,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:12,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:12,863 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 11:25:12,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:13,092 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 11:25:13,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324108571] [2019-10-22 11:25:13,093 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 11:25:13,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2019-10-22 11:25:13,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277445677] [2019-10-22 11:25:13,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:25:13,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:25:13,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:13,102 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 7 states. [2019-10-22 11:25:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,147 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-10-22 11:25:13,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:25:13,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-22 11:25:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,149 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:25:13,149 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:25:13,150 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 11:25:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:25:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-10-22 11:25:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 11:25:13,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2019-10-22 11:25:13,157 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 21 [2019-10-22 11:25:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,157 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2019-10-22 11:25:13,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:25:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2019-10-22 11:25:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:25:13,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,159 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 11:25:13,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:13,360 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 844306575, now seen corresponding path program 1 times [2019-10-22 11:25:13,361 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:13,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [569498363] [2019-10-22 11:25:13,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:13,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:13,428 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 11:25:13,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:13,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:13,599 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 11:25:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [569498363] [2019-10-22 11:25:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419675282] [2019-10-22 11:25:13,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:13,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:13,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:13,653 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 11:25:13,658 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:13,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:13,797 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 11:25:13,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:13,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:25:13,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732268004] [2019-10-22 11:25:13,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:25:13,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:25:13,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:25:13,802 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2019-10-22 11:25:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:13,898 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2019-10-22 11:25:13,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:25:13,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-22 11:25:13,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:13,901 INFO L225 Difference]: With dead ends: 27 [2019-10-22 11:25:13,901 INFO L226 Difference]: Without dead ends: 23 [2019-10-22 11:25:13,901 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 11:25:13,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-22 11:25:13,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-22 11:25:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 11:25:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 33 transitions. [2019-10-22 11:25:13,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 33 transitions. Word has length 22 [2019-10-22 11:25:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:13,909 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 33 transitions. [2019-10-22 11:25:13,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:25:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 33 transitions. [2019-10-22 11:25:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:25:13,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:13,911 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 11:25:14,312 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 11:25:14,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash 571748771, now seen corresponding path program 2 times [2019-10-22 11:25:14,313 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:14,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970015304] [2019-10-22 11:25:14,314 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:14,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:14,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:14,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:14,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:14,422 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 11:25:14,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:14,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:14,578 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 11:25:14,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970015304] [2019-10-22 11:25:14,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615940484] [2019-10-22 11:25:14,579 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:14,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:14,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:14,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:14,625 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:14,631 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 11:25:14,631 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:14,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:14,722 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 11:25:14,722 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:14,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:25:14,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739572139] [2019-10-22 11:25:14,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:25:14,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:14,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:25:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:25:14,724 INFO L87 Difference]: Start difference. First operand 23 states and 33 transitions. Second operand 9 states. [2019-10-22 11:25:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:14,817 INFO L93 Difference]: Finished difference Result 48 states and 84 transitions. [2019-10-22 11:25:14,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:25:14,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-10-22 11:25:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:14,820 INFO L225 Difference]: With dead ends: 48 [2019-10-22 11:25:14,820 INFO L226 Difference]: Without dead ends: 27 [2019-10-22 11:25:14,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 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 11:25:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-22 11:25:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-22 11:25:14,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-22 11:25:14,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 42 transitions. [2019-10-22 11:25:14,830 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 42 transitions. Word has length 22 [2019-10-22 11:25:14,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:14,831 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 42 transitions. [2019-10-22 11:25:14,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:25:14,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 42 transitions. [2019-10-22 11:25:14,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:25:14,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:14,834 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 11:25:15,234 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 11:25:15,235 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:15,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:15,235 INFO L82 PathProgramCache]: Analyzing trace with hash -705043475, now seen corresponding path program 3 times [2019-10-22 11:25:15,235 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:15,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1723440271] [2019-10-22 11:25:15,236 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:15,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:25:15,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:15,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:25:15,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:15,360 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 11:25:15,360 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:15,636 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 11:25:15,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1723440271] [2019-10-22 11:25:15,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167994562] [2019-10-22 11:25:15,636 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:15,680 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 11:25:15,680 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:15,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 11:25:15,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:15,691 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 11:25:15,691 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:15,926 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 11:25:15,926 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:15,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2019-10-22 11:25:15,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655147169] [2019-10-22 11:25:15,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:25:15,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:25:15,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:25:15,928 INFO L87 Difference]: Start difference. First operand 27 states and 42 transitions. Second operand 11 states. [2019-10-22 11:25:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:16,169 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2019-10-22 11:25:16,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:25:16,171 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-22 11:25:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:16,173 INFO L225 Difference]: With dead ends: 77 [2019-10-22 11:25:16,173 INFO L226 Difference]: Without dead ends: 52 [2019-10-22 11:25:16,174 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 11:25:16,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-22 11:25:16,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-10-22 11:25:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-22 11:25:16,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 92 transitions. [2019-10-22 11:25:16,192 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 92 transitions. Word has length 34 [2019-10-22 11:25:16,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:16,192 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 92 transitions. [2019-10-22 11:25:16,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:25:16,192 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 92 transitions. [2019-10-22 11:25:16,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-22 11:25:16,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:16,193 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 11:25:16,594 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 11:25:16,594 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash 2100747161, now seen corresponding path program 4 times [2019-10-22 11:25:16,595 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:16,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [957901146] [2019-10-22 11:25:16,595 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:16,636 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:25:16,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:16,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:16,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:16,669 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 11:25:16,670 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:16,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:16,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:16,871 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 11:25:16,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [957901146] [2019-10-22 11:25:16,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315755892] [2019-10-22 11:25:16,871 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:16,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:25:16,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:16,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:16,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:16,912 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 11:25:16,912 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:17,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:17,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:17,067 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 11:25:17,067 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:17,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7, 9] total 11 [2019-10-22 11:25:17,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19485800] [2019-10-22 11:25:17,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 11:25:17,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:17,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 11:25:17,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:25:17,068 INFO L87 Difference]: Start difference. First operand 46 states and 92 transitions. Second operand 11 states. [2019-10-22 11:25:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:17,243 INFO L93 Difference]: Finished difference Result 95 states and 230 transitions. [2019-10-22 11:25:17,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:25:17,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-10-22 11:25:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:17,247 INFO L225 Difference]: With dead ends: 95 [2019-10-22 11:25:17,247 INFO L226 Difference]: Without dead ends: 50 [2019-10-22 11:25:17,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-22 11:25:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-22 11:25:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-22 11:25:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-22 11:25:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 95 transitions. [2019-10-22 11:25:17,269 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 95 transitions. Word has length 34 [2019-10-22 11:25:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:17,270 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 95 transitions. [2019-10-22 11:25:17,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 11:25:17,270 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 95 transitions. [2019-10-22 11:25:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-22 11:25:17,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:17,272 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 11:25:17,677 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 11:25:17,677 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:17,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:17,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1503930969, now seen corresponding path program 5 times [2019-10-22 11:25:17,678 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:17,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [457858803] [2019-10-22 11:25:17,678 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:17,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-10-22 11:25:17,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:17,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 11:25:17,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:17,784 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 11:25:17,785 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,344 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 11:25:18,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457858803] [2019-10-22 11:25:18,344 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 11:25:18,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2019-10-22 11:25:18,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498198207] [2019-10-22 11:25:18,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:25:18,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:18,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:25:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:25:18,346 INFO L87 Difference]: Start difference. First operand 50 states and 95 transitions. Second operand 6 states. [2019-10-22 11:25:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:18,487 INFO L93 Difference]: Finished difference Result 84 states and 171 transitions. [2019-10-22 11:25:18,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:25:18,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-10-22 11:25:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:18,489 INFO L225 Difference]: With dead ends: 84 [2019-10-22 11:25:18,489 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:25:18,491 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 11:25:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:25:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:25:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:25:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 54 transitions. [2019-10-22 11:25:18,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 54 transitions. Word has length 46 [2019-10-22 11:25:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:18,498 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 54 transitions. [2019-10-22 11:25:18,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:25:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2019-10-22 11:25:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-22 11:25:18,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:18,500 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 11:25:18,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:18,701 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:18,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:18,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1974214584, now seen corresponding path program 6 times [2019-10-22 11:25:18,702 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:18,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2051766209] [2019-10-22 11:25:18,702 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:18,763 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-22 11:25:18,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:18,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:18,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:18,802 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 11:25:18,802 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:18,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:19,020 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 11:25:19,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2051766209] [2019-10-22 11:25:19,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620076978] [2019-10-22 11:25:19,021 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:19,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-10-22 11:25:19,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:25:19,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:25:19,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:19,069 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 11:25:19,070 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:19,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:19,228 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 11:25:19,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:19,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7] total 9 [2019-10-22 11:25:19,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613019512] [2019-10-22 11:25:19,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:25:19,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:25:19,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:25:19,230 INFO L87 Difference]: Start difference. First operand 36 states and 54 transitions. Second operand 9 states. [2019-10-22 11:25:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:19,351 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2019-10-22 11:25:19,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:25:19,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-22 11:25:19,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:19,353 INFO L225 Difference]: With dead ends: 40 [2019-10-22 11:25:19,354 INFO L226 Difference]: Without dead ends: 36 [2019-10-22 11:25:19,354 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 11:25:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-22 11:25:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-22 11:25:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-22 11:25:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 53 transitions. [2019-10-22 11:25:19,360 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 53 transitions. Word has length 47 [2019-10-22 11:25:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:19,360 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 53 transitions. [2019-10-22 11:25:19,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:25:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2019-10-22 11:25:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-22 11:25:19,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:19,363 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 11:25:19,763 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 11:25:19,764 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:19,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:19,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1709057054, now seen corresponding path program 7 times [2019-10-22 11:25:19,765 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:19,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1364992657] [2019-10-22 11:25:19,765 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:19,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:19,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:19,901 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 11:25:19,902 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:20,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,343 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 11:25:20,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364992657] [2019-10-22 11:25:20,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701959261] [2019-10-22 11:25:20,344 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:25:20,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 11:25:20,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:25:20,439 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 11:25:20,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:25:20,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:25:20,774 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 11:25:20,774 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:25:20,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8, 11] total 13 [2019-10-22 11:25:20,775 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938819064] [2019-10-22 11:25:20,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 11:25:20,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:25:20,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 11:25:20,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-22 11:25:20,776 INFO L87 Difference]: Start difference. First operand 36 states and 53 transitions. Second operand 13 states. [2019-10-22 11:25:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:25:20,982 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2019-10-22 11:25:20,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:25:20,982 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 85 [2019-10-22 11:25:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:25:20,984 INFO L225 Difference]: With dead ends: 81 [2019-10-22 11:25:20,984 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 11:25:20,985 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 11:25:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 11:25:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-22 11:25:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-22 11:25:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2019-10-22 11:25:20,999 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 85 [2019-10-22 11:25:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:25:21,000 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2019-10-22 11:25:21,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 11:25:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2019-10-22 11:25:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-22 11:25:21,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:25:21,001 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 11:25:21,404 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 11:25:21,404 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:25:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:25:21,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1736681501, now seen corresponding path program 8 times [2019-10-22 11:25:21,405 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:25:21,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1228612802] [2019-10-22 11:25:21,405 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/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 11:25:21,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:25:21,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-10-22 11:25:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:25:21,725 INFO L168 tionRefinementEngine]: Strategy WALRUS found a feasible trace [2019-10-22 11:25:21,725 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:25:21,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:25:21,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:25:21 BoogieIcfgContainer [2019-10-22 11:25:21,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:25:21,954 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:25:21,954 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:25:21,954 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:25:21,955 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:25:12" (3/4) ... [2019-10-22 11:25:21,956 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:25:22,003 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1b39833b-c08e-49f9-a9b5-ab2224ff9e16/bin/utaipan/witness.graphml [2019-10-22 11:25:22,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:25:22,005 INFO L168 Benchmark]: Toolchain (without parser) took 10463.24 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 313.5 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -177.9 MB). Peak memory consumption was 135.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:22,005 INFO L168 Benchmark]: CDTParser took 0.14 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 11:25:22,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 189.97 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 937.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:22,006 INFO L168 Benchmark]: Boogie Procedure Inliner took 124.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -207.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:22,007 INFO L168 Benchmark]: Boogie Preprocessor took 19.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:22,007 INFO L168 Benchmark]: RCFGBuilder took 231.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:22,007 INFO L168 Benchmark]: TraceAbstraction took 9844.19 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.5 MB). Peak memory consumption was 161.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:25:22,008 INFO L168 Benchmark]: Witness Printer took 49.09 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:25:22,010 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 189.97 ms. Allocated memory is still 1.0 GB. Free memory was 948.3 MB in the beginning and 937.6 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 124.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 937.6 MB in the beginning and 1.1 GB in the end (delta: -207.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.60 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 231.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9844.19 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 163.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -1.5 MB). Peak memory consumption was 161.5 MB. Max. memory is 11.5 GB. * Witness Printer took 49.09 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. 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 = 5; [L25] CALL, EXPR fibo(x) 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); [L25] RET, EXPR fibo(x) [L25] int result = fibo(x); [L26] COND TRUE result == 5 [L27] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Result: UNSAFE, OverallTime: 9.7s, OverallIterations: 10, TraceHistogramMax: 15, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 159 SDslu, 375 SDs, 0 SdLazy, 607 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 1024 SyntacticMatches, 11 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, 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, 9 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 662 NumberOfCodeBlocks, 569 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 134345 SizeOfPredicates, 48 NumberOfNonLiveVariables, 678 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 1854/2714 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...