./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d .................................................................................................................................................................................................................................................................................................................................................................................................... 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/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 ffdaeeffc8c5fdb555812137dbba1199bd1a626d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:54:48,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:54:48,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:54:48,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:54:48,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:54:48,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:54:48,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:54:48,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:54:48,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:54:48,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:54:48,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:54:48,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:54:48,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:54:48,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:54:48,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:54:48,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:54:48,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:54:48,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:54:48,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:54:48,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:54:48,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:54:48,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:54:48,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:54:48,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:54:48,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:54:48,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:54:48,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:54:48,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:54:48,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:54:48,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:54:48,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:54:48,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:54:48,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:54:48,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:54:48,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:54:48,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:54:48,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:54:48,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:54:48,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:54:48,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:54:48,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:54:48,267 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:54:48,292 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:54:48,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:54:48,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:54:48,303 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:54:48,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:54:48,303 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:54:48,304 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:54:48,304 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:54:48,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:54:48,304 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:54:48,305 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:54:48,305 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:54:48,305 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:54:48,305 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:54:48,306 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:54:48,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:54:48,306 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:54:48,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:54:48,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:54:48,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:54:48,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:54:48,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:54:48,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:54:48,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:54:48,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:54:48,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:54:48,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:54:48,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:54:48,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:54:48,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:54:48,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:54:48,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:54:48,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:54:48,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:54:48,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:54:48,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:54:48,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:54:48,312 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/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-11-26 02:54:48,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:54:48,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:54:48,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:54:48,506 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:54:48,506 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:54:48,507 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-26 02:54:48,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/ae6b60fda/f9db1254501b4c5aacbd0e130a1a7435/FLAGcff930fba [2019-11-26 02:54:48,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:54:48,933 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-26 02:54:48,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/ae6b60fda/f9db1254501b4c5aacbd0e130a1a7435/FLAGcff930fba [2019-11-26 02:54:49,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/ae6b60fda/f9db1254501b4c5aacbd0e130a1a7435 [2019-11-26 02:54:49,340 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:54:49,342 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:54:49,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:54:49,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:54:49,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:54:49,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee3b40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49, skipping insertion in model container [2019-11-26 02:54:49,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:54:49,376 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:54:49,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:54:49,556 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:54:49,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:54:49,652 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:54:49,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49 WrapperNode [2019-11-26 02:54:49,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:54:49,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:54:49,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:54:49,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:54:49,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:54:49,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:54:49,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:54:49,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:54:49,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... [2019-11-26 02:54:49,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:54:49,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:54:49,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:54:49,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:54:49,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:49,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:54:49,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:54:49,807 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-26 02:54:49,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-26 02:54:49,808 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-26 02:54:49,808 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-26 02:54:50,003 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:54:50,003 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:54:50,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:54:50 BoogieIcfgContainer [2019-11-26 02:54:50,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:54:50,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:54:50,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:54:50,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:54:50,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:54:49" (1/3) ... [2019-11-26 02:54:50,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1671d7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:54:50, skipping insertion in model container [2019-11-26 02:54:50,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:49" (2/3) ... [2019-11-26 02:54:50,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1671d7d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:54:50, skipping insertion in model container [2019-11-26 02:54:50,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:54:50" (3/3) ... [2019-11-26 02:54:50,023 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-11-26 02:54:50,032 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:54:50,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:54:50,071 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:54:50,112 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:54:50,112 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:54:50,112 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:54:50,112 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:54:50,113 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:54:50,113 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:54:50,113 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:54:50,113 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:54:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-26 02:54:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:54:50,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:50,162 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:50,163 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1871295635, now seen corresponding path program 1 times [2019-11-26 02:54:50,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:54:50,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247260229] [2019-11-26 02:54:50,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:54:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:50,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247260229] [2019-11-26 02:54:50,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:54:50,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:54:50,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523216454] [2019-11-26 02:54:50,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:54:50,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:54:50,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:54:50,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:54:50,407 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-11-26 02:54:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:50,516 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-11-26 02:54:50,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:54:50,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-26 02:54:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:50,527 INFO L225 Difference]: With dead ends: 34 [2019-11-26 02:54:50,528 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:54:50,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:54:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:54:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-26 02:54:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:54:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-26 02:54:50,570 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2019-11-26 02:54:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:50,571 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-26 02:54:50,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:54:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-26 02:54:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:54:50,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:50,573 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:50,573 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:50,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1404217650, now seen corresponding path program 1 times [2019-11-26 02:54:50,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:54:50,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656030004] [2019-11-26 02:54:50,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:54:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:50,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656030004] [2019-11-26 02:54:50,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:54:50,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-26 02:54:50,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411618948] [2019-11-26 02:54:50,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:54:50,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:54:50,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:54:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:54:50,618 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2019-11-26 02:54:50,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:50,680 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-11-26 02:54:50,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:54:50,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-26 02:54:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:50,683 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:54:50,683 INFO L226 Difference]: Without dead ends: 28 [2019-11-26 02:54:50,684 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:54:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-26 02:54:50,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-11-26 02:54:50,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:54:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-26 02:54:50,692 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2019-11-26 02:54:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:50,692 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-26 02:54:50,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:54:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-26 02:54:50,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:54:50,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:50,694 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:50,694 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1629927371, now seen corresponding path program 1 times [2019-11-26 02:54:50,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:54:50,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258911703] [2019-11-26 02:54:50,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:54:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:50,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258911703] [2019-11-26 02:54:50,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334601388] [2019-11-26 02:54:50,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:50,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:54:50,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:50,893 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:51,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:54:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:51,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229336741] [2019-11-26 02:54:51,129 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-11-26 02:54:51,129 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:54:51,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:54:51,141 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:54:51,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:54:51,223 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 3 for LOIs [2019-11-26 02:54:51,240 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 8 for LOIs [2019-11-26 02:54:51,247 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:54:51,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:54:51,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7] total 15 [2019-11-26 02:54:51,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056310433] [2019-11-26 02:54:51,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:54:51,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:54:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:54:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:54:51,382 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 7 states. [2019-11-26 02:54:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:51,440 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-11-26 02:54:51,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:54:51,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-11-26 02:54:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:51,442 INFO L225 Difference]: With dead ends: 68 [2019-11-26 02:54:51,443 INFO L226 Difference]: Without dead ends: 44 [2019-11-26 02:54:51,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:54:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-26 02:54:51,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-26 02:54:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-26 02:54:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-26 02:54:51,453 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2019-11-26 02:54:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:51,453 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-26 02:54:51,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:54:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-26 02:54:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:54:51,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:51,456 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:51,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:54:51,662 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash -649262923, now seen corresponding path program 1 times [2019-11-26 02:54:51,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:54:51,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498007676] [2019-11-26 02:54:51,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:54:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:51,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:54:51,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498007676] [2019-11-26 02:54:51,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455475834] [2019-11-26 02:54:51,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:54:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:51,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:54:51,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:54:51,905 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:54:52,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [116001922] [2019-11-26 02:54:52,322 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2019-11-26 02:54:52,322 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:54:52,323 FATAL L310 FreeRefinementEngine]: Exception during interpolant generation: IllegalArgumentException [2019-11-26 02:54:52,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:54:52,524 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) 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.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) 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:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) 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) [2019-11-26 02:54:52,528 INFO L168 Benchmark]: Toolchain (without parser) took 3186.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 950.1 MB in the beginning and 971.0 MB in the end (delta: -21.0 MB). Peak memory consumption was 171.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:54:52,529 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:54:52,529 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -236.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:54:52,530 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:54:52,530 INFO L168 Benchmark]: Boogie Preprocessor took 31.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:54:52,531 INFO L168 Benchmark]: RCFGBuilder took 282.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:54:52,532 INFO L168 Benchmark]: TraceAbstraction took 2521.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 971.0 MB in the end (delta: 192.4 MB). Peak memory consumption was 192.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:54:52,539 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 307.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 950.1 MB in the beginning and 1.2 GB in the end (delta: -236.4 MB). Peak memory consumption was 28.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 36.04 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.58 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 282.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2521.14 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 971.0 MB in the end (delta: 192.4 MB). Peak memory consumption was 192.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: Recursive programs are not supported. de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: Recursive programs are not supported.: de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:54:54,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:54:54,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:54:54,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:54:54,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:54:54,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:54:54,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:54:54,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:54:54,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:54:54,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:54:54,470 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:54:54,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:54:54,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:54:54,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:54:54,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:54:54,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:54:54,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:54:54,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:54:54,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:54:54,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:54:54,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:54:54,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:54:54,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:54:54,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:54:54,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:54:54,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:54:54,501 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:54:54,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:54:54,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:54:54,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:54:54,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:54:54,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:54:54,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:54:54,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:54:54,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:54:54,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:54:54,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:54:54,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:54:54,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:54:54,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:54:54,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:54:54,515 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-11-26 02:54:54,531 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:54:54,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:54:54,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:54:54,533 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:54:54,533 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:54:54,533 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:54:54,534 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:54:54,534 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:54:54,534 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:54:54,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:54:54,536 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:54:54,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:54:54,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:54:54,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:54:54,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:54:54,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:54:54,538 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:54:54,538 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:54:54,539 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:54:54,539 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:54:54,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:54:54,539 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:54:54,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:54:54,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:54:54,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:54:54,541 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:54:54,541 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:54:54,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:54:54,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:54:54,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:54:54,542 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:54:54,542 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:54:54,542 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:54:54,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:54:54,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:54:54,543 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/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 -> ffdaeeffc8c5fdb555812137dbba1199bd1a626d [2019-11-26 02:54:54,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:54:54,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:54:54,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:54:54,816 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:54:54,817 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:54:54,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/../../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-26 02:54:54,880 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/a0e845d81/731816c5245446348a4e64d0f8ac3336/FLAGade00f4fb [2019-11-26 02:54:55,258 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:54:55,259 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2019-11-26 02:54:55,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/a0e845d81/731816c5245446348a4e64d0f8ac3336/FLAGade00f4fb [2019-11-26 02:54:55,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/data/a0e845d81/731816c5245446348a4e64d0f8ac3336 [2019-11-26 02:54:55,701 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:54:55,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:54:55,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:54:55,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:54:55,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:54:55,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:55,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@292030f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55, skipping insertion in model container [2019-11-26 02:54:55,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:55,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:54:55,751 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:54:55,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:54:55,941 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:54:55,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:54:55,967 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:54:55,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55 WrapperNode [2019-11-26 02:54:55,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:54:55,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:54:55,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:54:55,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:54:55,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:55,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:54:56,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:54:56,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:54:56,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:54:56,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... [2019-11-26 02:54:56,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:54:56,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:54:56,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:54:56,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:54:56,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:54:56,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:54:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-11-26 02:54:56,126 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-11-26 02:54:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-11-26 02:54:56,126 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-11-26 02:54:56,359 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:54:56,360 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:54:56,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:54:56 BoogieIcfgContainer [2019-11-26 02:54:56,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:54:56,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:54:56,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:54:56,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:54:56,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:54:55" (1/3) ... [2019-11-26 02:54:56,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592ec655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:54:56, skipping insertion in model container [2019-11-26 02:54:56,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:54:55" (2/3) ... [2019-11-26 02:54:56,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592ec655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:54:56, skipping insertion in model container [2019-11-26 02:54:56,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:54:56" (3/3) ... [2019-11-26 02:54:56,375 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2019-11-26 02:54:56,384 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:54:56,392 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:54:56,402 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:54:56,419 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:54:56,419 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:54:56,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:54:56,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:54:56,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:54:56,420 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:54:56,420 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:54:56,420 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:54:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-26 02:54:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:54:56,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:56,438 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:56,439 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:56,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:56,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1762602805, now seen corresponding path program 1 times [2019-11-26 02:54:56,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:54:56,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1141877758] [2019-11-26 02:54:56,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:56,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:54:56,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:56,593 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:56,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141877758] [2019-11-26 02:54:56,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:54:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:54:56,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842174435] [2019-11-26 02:54:56,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:54:56,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:54:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:54:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:54:56,722 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 7 states. [2019-11-26 02:54:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:56,866 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-11-26 02:54:56,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:54:56,869 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:54:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:56,881 INFO L225 Difference]: With dead ends: 36 [2019-11-26 02:54:56,881 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 02:54:56,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:54:56,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 02:54:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-26 02:54:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-26 02:54:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-26 02:54:56,941 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 9 [2019-11-26 02:54:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:56,942 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-26 02:54:56,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:54:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-26 02:54:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:54:56,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:56,946 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:57,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:54:57,147 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:57,147 INFO L82 PathProgramCache]: Analyzing trace with hash -450158515, now seen corresponding path program 1 times [2019-11-26 02:54:57,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:54:57,148 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1408913435] [2019-11-26 02:54:57,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:57,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:54:57,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:57,203 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:54:57,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408913435] [2019-11-26 02:54:57,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:54:57,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-26 02:54:57,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7287954] [2019-11-26 02:54:57,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:54:57,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:54:57,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:54:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:54:57,270 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 7 states. [2019-11-26 02:54:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:57,383 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-26 02:54:57,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:54:57,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-26 02:54:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:57,385 INFO L225 Difference]: With dead ends: 30 [2019-11-26 02:54:57,385 INFO L226 Difference]: Without dead ends: 26 [2019-11-26 02:54:57,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:54:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-26 02:54:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-26 02:54:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-26 02:54:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-26 02:54:57,394 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 10 [2019-11-26 02:54:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:57,394 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-26 02:54:57,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:54:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-26 02:54:57,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:54:57,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:57,396 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:57,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:54:57,602 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:57,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1017181589, now seen corresponding path program 1 times [2019-11-26 02:54:57,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:54:57,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [374279832] [2019-11-26 02:54:57,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:57,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:54:57,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:57,719 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:57,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:54:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:58,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374279832] [2019-11-26 02:54:58,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834600362] [2019-11-26 02:54:58,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:58,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:54:58,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:58,217 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:58,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:54:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:58,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:54:58,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 8] total 15 [2019-11-26 02:54:58,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581368770] [2019-11-26 02:54:58,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-26 02:54:58,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:54:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-26 02:54:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:54:58,720 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 15 states. [2019-11-26 02:54:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:54:59,240 INFO L93 Difference]: Finished difference Result 56 states and 81 transitions. [2019-11-26 02:54:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:54:59,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2019-11-26 02:54:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:54:59,244 INFO L225 Difference]: With dead ends: 56 [2019-11-26 02:54:59,244 INFO L226 Difference]: Without dead ends: 34 [2019-11-26 02:54:59,245 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:54:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-26 02:54:59,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-11-26 02:54:59,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-26 02:54:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2019-11-26 02:54:59,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 21 [2019-11-26 02:54:59,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:54:59,253 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2019-11-26 02:54:59,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-26 02:54:59,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2019-11-26 02:54:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-26 02:54:59,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:54:59,256 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:54:59,660 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 [2019-11-26 02:54:59,660 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:54:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:54:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1369022552, now seen corresponding path program 1 times [2019-11-26 02:54:59,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:54:59,662 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [740232987] [2019-11-26 02:54:59,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:59,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:54:59,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:59,759 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:54:59,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:54:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:59,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [740232987] [2019-11-26 02:54:59,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448890813] [2019-11-26 02:54:59,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:54:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:54:59,958 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:54:59,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:54:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:54:59,968 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:00,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:00,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:55:00,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:00,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 10 [2019-11-26 02:55:00,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32653360] [2019-11-26 02:55:00,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:55:00,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:00,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:55:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:55:00,116 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand 10 states. [2019-11-26 02:55:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:00,285 INFO L93 Difference]: Finished difference Result 64 states and 93 transitions. [2019-11-26 02:55:00,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:55:00,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-11-26 02:55:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:00,288 INFO L225 Difference]: With dead ends: 64 [2019-11-26 02:55:00,288 INFO L226 Difference]: Without dead ends: 36 [2019-11-26 02:55:00,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:55:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-26 02:55:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-26 02:55:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-26 02:55:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 45 transitions. [2019-11-26 02:55:00,297 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 45 transitions. Word has length 22 [2019-11-26 02:55:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:00,297 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 45 transitions. [2019-11-26 02:55:00,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:55:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 45 transitions. [2019-11-26 02:55:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-26 02:55:00,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:00,299 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:00,700 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 [2019-11-26 02:55:00,701 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -870174923, now seen corresponding path program 1 times [2019-11-26 02:55:00,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:00,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1542770326] [2019-11-26 02:55:00,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:55:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:00,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:55:00,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-26 02:55:00,836 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:01,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:01,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:55:01,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542770326] [2019-11-26 02:55:01,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775735547] [2019-11-26 02:55:01,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:55:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:01,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:55:01,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-26 02:55:01,474 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:01,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-26 02:55:01,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:01,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8] total 19 [2019-11-26 02:55:01,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259044223] [2019-11-26 02:55:01,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-26 02:55:01,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-26 02:55:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:55:01,916 INFO L87 Difference]: Start difference. First operand 33 states and 45 transitions. Second operand 19 states. [2019-11-26 02:55:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:02,873 INFO L93 Difference]: Finished difference Result 81 states and 125 transitions. [2019-11-26 02:55:02,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-26 02:55:02,874 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2019-11-26 02:55:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:02,876 INFO L225 Difference]: With dead ends: 81 [2019-11-26 02:55:02,876 INFO L226 Difference]: Without dead ends: 50 [2019-11-26 02:55:02,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2019-11-26 02:55:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-26 02:55:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2019-11-26 02:55:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-26 02:55:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-11-26 02:55:02,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 33 [2019-11-26 02:55:02,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:02,896 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-11-26 02:55:02,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-26 02:55:02,896 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-11-26 02:55:02,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:55:02,897 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:02,897 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:03,298 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 [2019-11-26 02:55:03,298 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1188091742, now seen corresponding path program 1 times [2019-11-26 02:55:03,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:03,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1528826357] [2019-11-26 02:55:03,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:55:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:03,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:55:03,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:55:03,383 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:03,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:03,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:55:03,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528826357] [2019-11-26 02:55:03,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017282005] [2019-11-26 02:55:03,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:55:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:03,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:55:03,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-26 02:55:03,672 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:03,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:03,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-26 02:55:03,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:03,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9] total 12 [2019-11-26 02:55:03,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834793695] [2019-11-26 02:55:03,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-26 02:55:03,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-26 02:55:03,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:55:03,918 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 12 states. [2019-11-26 02:55:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:04,129 INFO L93 Difference]: Finished difference Result 89 states and 142 transitions. [2019-11-26 02:55:04,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:55:04,131 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-26 02:55:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:04,133 INFO L225 Difference]: With dead ends: 89 [2019-11-26 02:55:04,133 INFO L226 Difference]: Without dead ends: 52 [2019-11-26 02:55:04,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:55:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-26 02:55:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-26 02:55:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-26 02:55:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2019-11-26 02:55:04,147 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 35 [2019-11-26 02:55:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:04,147 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2019-11-26 02:55:04,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-26 02:55:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2019-11-26 02:55:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-26 02:55:04,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:04,151 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:04,552 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 [2019-11-26 02:55:04,553 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -375163772, now seen corresponding path program 1 times [2019-11-26 02:55:04,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:04,554 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [334828902] [2019-11-26 02:55:04,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/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 [2019-11-26 02:55:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:04,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:55:04,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:55:04,649 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:04,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:55:04,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [334828902] [2019-11-26 02:55:04,839 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574362373] [2019-11-26 02:55:04,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:04,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:55:04,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:55:04,890 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:05,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-26 02:55:05,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:05,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 10 [2019-11-26 02:55:05,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472767393] [2019-11-26 02:55:05,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:55:05,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:05,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:55:05,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:55:05,059 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand 10 states. [2019-11-26 02:55:05,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:05,205 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2019-11-26 02:55:05,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:55:05,206 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-11-26 02:55:05,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:05,208 INFO L225 Difference]: With dead ends: 64 [2019-11-26 02:55:05,208 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:55:05,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-26 02:55:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:55:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-11-26 02:55:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-26 02:55:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 85 transitions. [2019-11-26 02:55:05,222 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 85 transitions. Word has length 46 [2019-11-26 02:55:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:05,223 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 85 transitions. [2019-11-26 02:55:05,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:55:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 85 transitions. [2019-11-26 02:55:05,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-26 02:55:05,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:05,227 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:05,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:05,629 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:05,629 INFO L82 PathProgramCache]: Analyzing trace with hash -136494173, now seen corresponding path program 1 times [2019-11-26 02:55:05,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:05,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [830215431] [2019-11-26 02:55:05,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:05,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:55:05,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 39 proven. 50 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-26 02:55:05,782 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 45 proven. 39 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-11-26 02:55:06,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830215431] [2019-11-26 02:55:06,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469880728] [2019-11-26 02:55:06,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:06,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:55:06,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 79 proven. 31 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-26 02:55:06,509 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:06,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:06,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:07,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:07,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 79 proven. 41 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-26 02:55:07,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:07,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10, 13] total 22 [2019-11-26 02:55:07,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463189740] [2019-11-26 02:55:07,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-26 02:55:07,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-26 02:55:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:55:07,191 INFO L87 Difference]: Start difference. First operand 57 states and 85 transitions. Second operand 22 states. [2019-11-26 02:55:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:07,816 INFO L93 Difference]: Finished difference Result 142 states and 276 transitions. [2019-11-26 02:55:07,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-26 02:55:07,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 94 [2019-11-26 02:55:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:07,819 INFO L225 Difference]: With dead ends: 142 [2019-11-26 02:55:07,819 INFO L226 Difference]: Without dead ends: 87 [2019-11-26 02:55:07,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 351 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2019-11-26 02:55:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-26 02:55:07,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2019-11-26 02:55:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-26 02:55:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 131 transitions. [2019-11-26 02:55:07,841 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 131 transitions. Word has length 94 [2019-11-26 02:55:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:07,842 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 131 transitions. [2019-11-26 02:55:07,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-26 02:55:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 131 transitions. [2019-11-26 02:55:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-26 02:55:07,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:07,845 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:08,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:08,252 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash 188017537, now seen corresponding path program 2 times [2019-11-26 02:55:08,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:08,252 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [886264197] [2019-11-26 02:55:08,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:08,329 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:55:08,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:08,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:55:08,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-26 02:55:08,427 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:08,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:08,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:09,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-26 02:55:09,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [886264197] [2019-11-26 02:55:09,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291246191] [2019-11-26 02:55:09,155 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:09,209 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:55:09,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:09,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:55:09,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-26 02:55:09,476 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:10,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:55:10,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-26 02:55:10,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:10,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 10] total 23 [2019-11-26 02:55:10,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34511502] [2019-11-26 02:55:10,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-26 02:55:10,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-26 02:55:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:55:10,377 INFO L87 Difference]: Start difference. First operand 79 states and 131 transitions. Second operand 23 states. [2019-11-26 02:55:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:11,868 INFO L93 Difference]: Finished difference Result 198 states and 392 transitions. [2019-11-26 02:55:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-26 02:55:11,869 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 58 [2019-11-26 02:55:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:11,871 INFO L225 Difference]: With dead ends: 198 [2019-11-26 02:55:11,871 INFO L226 Difference]: Without dead ends: 121 [2019-11-26 02:55:11,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2019-11-26 02:55:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-26 02:55:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2019-11-26 02:55:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-26 02:55:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 149 transitions. [2019-11-26 02:55:11,889 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 149 transitions. Word has length 58 [2019-11-26 02:55:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:11,890 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 149 transitions. [2019-11-26 02:55:11,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-26 02:55:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 149 transitions. [2019-11-26 02:55:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-26 02:55:11,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:11,892 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:12,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:12,294 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -927001472, now seen corresponding path program 1 times [2019-11-26 02:55:12,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:12,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [986634324] [2019-11-26 02:55:12,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:12,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-26 02:55:12,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-26 02:55:12,552 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-26 02:55:13,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986634324] [2019-11-26 02:55:13,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328670197] [2019-11-26 02:55:13,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:13,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:55:13,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:55:13,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-26 02:55:13,326 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-26 02:55:13,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:13,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17, 17] total 23 [2019-11-26 02:55:13,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82940211] [2019-11-26 02:55:13,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-26 02:55:13,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:13,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-26 02:55:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:55:13,769 INFO L87 Difference]: Start difference. First operand 99 states and 149 transitions. Second operand 23 states. [2019-11-26 02:55:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:14,386 INFO L93 Difference]: Finished difference Result 135 states and 238 transitions. [2019-11-26 02:55:14,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-26 02:55:14,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2019-11-26 02:55:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:14,388 INFO L225 Difference]: With dead ends: 135 [2019-11-26 02:55:14,388 INFO L226 Difference]: Without dead ends: 131 [2019-11-26 02:55:14,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 193 SyntacticMatches, 22 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2019-11-26 02:55:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-26 02:55:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2019-11-26 02:55:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-26 02:55:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 202 transitions. [2019-11-26 02:55:14,426 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 202 transitions. Word has length 60 [2019-11-26 02:55:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:14,428 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 202 transitions. [2019-11-26 02:55:14,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-26 02:55:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 202 transitions. [2019-11-26 02:55:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-26 02:55:14,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:14,433 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:14,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:14,836 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:14,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:14,837 INFO L82 PathProgramCache]: Analyzing trace with hash -454182384, now seen corresponding path program 2 times [2019-11-26 02:55:14,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:14,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2079295663] [2019-11-26 02:55:14,837 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:14,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:55:14,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:14,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:55:14,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-26 02:55:14,935 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-26 02:55:15,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2079295663] [2019-11-26 02:55:15,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373751136] [2019-11-26 02:55:15,279 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:15,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-26 02:55:15,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:15,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:55:15,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-26 02:55:15,581 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:16,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:55:16,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-26 02:55:16,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-26 02:55:16,716 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-26 02:55:16,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:55:16,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:16,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:55:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-26 02:55:17,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:17,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11, 13] total 24 [2019-11-26 02:55:17,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143487237] [2019-11-26 02:55:17,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-26 02:55:17,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-26 02:55:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:55:17,210 INFO L87 Difference]: Start difference. First operand 117 states and 202 transitions. Second operand 24 states. [2019-11-26 02:55:18,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:18,404 INFO L93 Difference]: Finished difference Result 254 states and 554 transitions. [2019-11-26 02:55:18,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-26 02:55:18,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2019-11-26 02:55:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:18,409 INFO L225 Difference]: With dead ends: 254 [2019-11-26 02:55:18,409 INFO L226 Difference]: Without dead ends: 135 [2019-11-26 02:55:18,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 253 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2019-11-26 02:55:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-26 02:55:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 116. [2019-11-26 02:55:18,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-26 02:55:18,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 215 transitions. [2019-11-26 02:55:18,425 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 215 transitions. Word has length 71 [2019-11-26 02:55:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:18,426 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 215 transitions. [2019-11-26 02:55:18,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-26 02:55:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 215 transitions. [2019-11-26 02:55:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-26 02:55:18,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:55:18,430 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:55:18,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:18,834 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:55:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:55:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1942511377, now seen corresponding path program 3 times [2019-11-26 02:55:18,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:55:18,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2146081931] [2019-11-26 02:55:18,834 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:55:18,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-26 02:55:18,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:18,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-26 02:55:18,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-26 02:55:18,972 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-11-26 02:55:19,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2146081931] [2019-11-26 02:55:19,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636990036] [2019-11-26 02:55:19,421 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:19,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-26 02:55:19,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:55:19,479 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:55:19,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:55:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-26 02:55:19,680 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:55:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 33 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-26 02:55:20,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-26 02:55:20,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9, 10] total 23 [2019-11-26 02:55:20,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315005713] [2019-11-26 02:55:20,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-26 02:55:20,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:55:20,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-26 02:55:20,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:55:20,660 INFO L87 Difference]: Start difference. First operand 116 states and 215 transitions. Second operand 23 states. [2019-11-26 02:55:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:55:21,529 INFO L93 Difference]: Finished difference Result 253 states and 565 transitions. [2019-11-26 02:55:21,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-26 02:55:21,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2019-11-26 02:55:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:55:21,543 INFO L225 Difference]: With dead ends: 253 [2019-11-26 02:55:21,543 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:55:21,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 259 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2019-11-26 02:55:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:55:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:55:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:55:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:55:21,546 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2019-11-26 02:55:21,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:55:21,547 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:55:21,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-26 02:55:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:55:21,547 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:55:21,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:55:21,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-26 02:55:22,602 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2019-11-26 02:55:22,907 WARN L192 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2019-11-26 02:55:23,388 WARN L192 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 28 [2019-11-26 02:55:23,391 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-26 02:55:23,391 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-26 02:55:23,391 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L440 ceAbstractionStarter]: At program point L41(lines 35 42) the Hoare annotation is: (= (_ bv4 32) ULTIMATE.start_main_~x~0) [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L440 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (= (_ bv4 32) ULTIMATE.start_main_~x~0) [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L447 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L444 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-11-26 02:55:23,392 INFO L440 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (= |fibo2_#in~n| fibo2_~n) (not (bvslt |fibo2_#in~n| (_ bv1 32))) (not (= (bvadd |fibo2_#in~n| (_ bv4294967295 32)) (_ bv0 32)))) [2019-11-26 02:55:23,393 INFO L440 ceAbstractionStarter]: At program point L23-1(line 23) the Hoare annotation is: (let ((.cse2 (bvadd |fibo2_#in~n| (_ bv4294967294 32)))) (let ((.cse1 (= (_ bv0 32) .cse2))) (and (let ((.cse0 (= |fibo2_#in~n| fibo2_~n))) (or (and .cse0 (= (_ bv1 32) |fibo2_#t~ret2|) (not (bvslt |fibo2_#in~n| (_ bv1 32)))) (and .cse0 (not (bvslt fibo2_~n (_ bv1 32))) (not .cse1) (not (= (bvadd |fibo2_#in~n| (_ bv4294967293 32)) (_ bv0 32)))))) (or .cse1 (not (bvslt .cse2 (_ bv1 32))))))) [2019-11-26 02:55:23,393 INFO L444 ceAbstractionStarter]: For program point L23-2(line 23) no Hoare annotation was computed. [2019-11-26 02:55:23,393 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-11-26 02:55:23,393 INFO L444 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-11-26 02:55:23,393 INFO L440 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (not (= (bvadd |fibo1_#in~n| (_ bv4294967295 32)) (_ bv0 32))) (= |fibo1_#in~n| fibo1_~n) (not (bvslt fibo1_~n (_ bv1 32)))) [2019-11-26 02:55:23,393 INFO L440 ceAbstractionStarter]: At program point L13-1(line 13) the Hoare annotation is: (and (let ((.cse0 (= |fibo1_#in~n| fibo1_~n)) (.cse1 (not (bvslt fibo1_~n (_ bv1 32))))) (or (and (= |fibo1_#t~ret0| (_ bv1 32)) .cse0 .cse1) (and .cse0 (not (= |fibo1_#in~n| (_ bv2 32))) .cse1))) (or (= (_ bv0 32) (bvadd |fibo1_#t~ret0| (_ bv4294967294 32))) (not (= (bvadd |fibo1_#in~n| (_ bv4294967292 32)) (_ bv0 32)))) (not (bvslt (bvadd |fibo1_#in~n| (_ bv4294967295 32)) (_ bv1 32)))) [2019-11-26 02:55:23,393 INFO L444 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2019-11-26 02:55:23,393 INFO L444 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-11-26 02:55:23,394 INFO L447 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-11-26 02:55:23,394 INFO L444 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-11-26 02:55:23,394 INFO L444 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-11-26 02:55:23,394 INFO L444 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-11-26 02:55:23,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:55:23 BoogieIcfgContainer [2019-11-26 02:55:23,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:55:23,404 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:55:23,404 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:55:23,404 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:55:23,405 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:54:56" (3/4) ... [2019-11-26 02:55:23,407 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:55:23,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2019-11-26 02:55:23,414 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2019-11-26 02:55:23,417 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-26 02:55:23,417 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 02:55:23,455 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_11c58967-4788-436a-8aa5-a351ac02ecfb/bin/utaipan/witness.graphml [2019-11-26 02:55:23,455 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:55:23,456 INFO L168 Benchmark]: Toolchain (without parser) took 27754.14 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 339.2 MB). Free memory was 956.4 MB in the beginning and 1.0 GB in the end (delta: -83.6 MB). Peak memory consumption was 255.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,457 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:55:23,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.40 ms. Allocated memory is still 1.0 GB. Free memory was 956.4 MB in the beginning and 945.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,457 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -207.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,458 INFO L168 Benchmark]: Boogie Preprocessor took 22.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,458 INFO L168 Benchmark]: RCFGBuilder took 282.18 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: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,459 INFO L168 Benchmark]: TraceAbstraction took 27041.73 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 85.1 MB). Peak memory consumption was 268.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,459 INFO L168 Benchmark]: Witness Printer took 51.21 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:55:23,461 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 981.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 248.40 ms. Allocated memory is still 1.0 GB. Free memory was 956.4 MB in the beginning and 945.7 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 88.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.2 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -207.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 6.4 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 282.18 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: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27041.73 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 85.1 MB). Peak memory consumption was 268.1 MB. Max. memory is 11.5 GB. * Witness Printer took 51.21 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 4bv32 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Result: SAFE, OverallTime: 26.9s, OverallIterations: 12, TraceHistogramMax: 8, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, HoareTripleCheckerStatistics: 268 SDtfs, 484 SDslu, 1896 SDs, 0 SdLazy, 2827 SolverSat, 439 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2117 GetRequests, 1836 SyntacticMatches, 44 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, 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, 12 MinimizatonAttempts, 86 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 323 PreInvPairs, 530 NumberOfFragments, 124 HoareAnnotationTreeSize, 323 FomulaSimplifications, 7792 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 8 FomulaSimplificationsInter, 2045 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 12.4s InterpolantComputationTime, 1041 NumberOfCodeBlocks, 1031 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2038 ConstructedInterpolants, 0 QuantifiedInterpolants, 378705 SizeOfPredicates, 76 NumberOfNonLiveVariables, 1475 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 44 InterpolantComputations, 4 PerfectInterpolantSequences, 2112/2888 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...