./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92a849e92f30134540f9595cfce3299e46e1c2b1 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:04:19,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:04:19,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:04:19,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:04:19,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:04:19,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:04:19,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:04:19,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:04:19,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:04:19,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:04:19,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:04:19,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:04:19,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:04:19,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:04:19,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:04:19,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:04:19,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:04:19,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:04:19,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:04:19,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:04:19,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:04:19,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:04:19,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:04:19,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:04:19,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:04:19,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:04:19,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:04:19,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:04:19,378 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:04:19,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:04:19,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:04:19,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:04:19,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:04:19,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:04:19,388 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:04:19,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:04:19,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:04:19,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:04:19,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:04:19,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:04:19,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:04:19,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:04:19,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:04:19,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:04:19,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:04:19,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:04:19,447 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:04:19,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:04:19,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:04:19,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:04:19,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:04:19,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:04:19,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:04:19,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:04:19,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:04:19,451 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:04:19,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:04:19,452 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:04:19,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:04:19,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:04:19,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:04:19,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:04:19,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:04:19,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:04:19,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:04:19,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:04:19,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:04:19,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:04:19,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:04:19,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:04:19,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:04:19,457 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92a849e92f30134540f9595cfce3299e46e1c2b1 [2020-11-30 01:04:19,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:04:19,820 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:04:19,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:04:19,826 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:04:19,828 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:04:19,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-11-30 01:04:19,917 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/data/82f3ca56b/6527f358116b41649602ee89e4eb5376/FLAG383f74605 [2020-11-30 01:04:20,438 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:04:20,439 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-11-30 01:04:20,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/data/82f3ca56b/6527f358116b41649602ee89e4eb5376/FLAG383f74605 [2020-11-30 01:04:20,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/data/82f3ca56b/6527f358116b41649602ee89e4eb5376 [2020-11-30 01:04:20,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:04:20,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:04:20,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:04:20,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:04:20,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:04:20,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:04:20" (1/1) ... [2020-11-30 01:04:20,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c08a477 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:20, skipping insertion in model container [2020-11-30 01:04:20,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:04:20" (1/1) ... [2020-11-30 01:04:20,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:04:20,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:04:21,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:04:21,125 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:04:21,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:04:21,174 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:04:21,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21 WrapperNode [2020-11-30 01:04:21,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:04:21,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:04:21,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:04:21,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:04:21,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,200 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:04:21,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:04:21,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:04:21,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:04:21,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... [2020-11-30 01:04:21,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:04:21,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:04:21,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:04:21,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:04:21,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:04:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:04:21,350 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-30 01:04:21,350 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-30 01:04:21,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:04:21,351 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-30 01:04:21,351 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-30 01:04:21,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:04:21,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:04:21,845 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:04:21,845 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 01:04:21,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:04:21 BoogieIcfgContainer [2020-11-30 01:04:21,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:04:21,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:04:21,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:04:21,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:04:21,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:04:20" (1/3) ... [2020-11-30 01:04:21,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511992b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:04:21, skipping insertion in model container [2020-11-30 01:04:21,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:04:21" (2/3) ... [2020-11-30 01:04:21,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@511992b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:04:21, skipping insertion in model container [2020-11-30 01:04:21,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:04:21" (3/3) ... [2020-11-30 01:04:21,858 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-11-30 01:04:21,870 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:04:21,875 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:04:21,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:04:21,929 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:04:21,930 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:04:21,930 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:04:21,930 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:04:21,930 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:04:21,930 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:04:21,930 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:04:21,930 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:04:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-30 01:04:21,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:04:21,959 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:21,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:21,961 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2146840844, now seen corresponding path program 1 times [2020-11-30 01:04:21,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:21,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177117580] [2020-11-30 01:04:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:04:22,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177117580] [2020-11-30 01:04:22,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:04:22,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:04:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132792860] [2020-11-30 01:04:22,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:04:22,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:04:22,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:04:22,342 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-11-30 01:04:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:22,415 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-11-30 01:04:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:04:22,419 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 01:04:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:22,439 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:04:22,439 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:04:22,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:04:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:04:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:04:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:04:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 01:04:22,502 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2020-11-30 01:04:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:22,503 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 01:04:22,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:04:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 01:04:22,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:04:22,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:22,507 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:22,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:04:22,507 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:22,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1412337332, now seen corresponding path program 1 times [2020-11-30 01:04:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:22,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238376067] [2020-11-30 01:04:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:04:22,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238376067] [2020-11-30 01:04:22,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:04:22,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:04:22,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133224699] [2020-11-30 01:04:22,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:04:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:04:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:04:22,622 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 5 states. [2020-11-30 01:04:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:22,672 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-11-30 01:04:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:04:22,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:04:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:22,675 INFO L225 Difference]: With dead ends: 33 [2020-11-30 01:04:22,675 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:04:22,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:04:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:04:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 01:04:22,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:04:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-11-30 01:04:22,684 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2020-11-30 01:04:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:22,685 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-11-30 01:04:22,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:04:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2020-11-30 01:04:22,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 01:04:22,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:22,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:22,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:04:22,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash -888595213, now seen corresponding path program 1 times [2020-11-30 01:04:22,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:22,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083848744] [2020-11-30 01:04:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 01:04:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:04:22,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083848744] [2020-11-30 01:04:22,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468544700] [2020-11-30 01:04:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:04:22,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:04:23,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:23,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2020-11-30 01:04:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118480484] [2020-11-30 01:04:23,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:04:23,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:23,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:04:23,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:04:23,087 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand 10 states. [2020-11-30 01:04:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:23,348 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-11-30 01:04:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:04:23,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-30 01:04:23,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:23,350 INFO L225 Difference]: With dead ends: 55 [2020-11-30 01:04:23,350 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 01:04:23,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:04:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 01:04:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-11-30 01:04:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:04:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-11-30 01:04:23,359 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2020-11-30 01:04:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:23,360 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-11-30 01:04:23,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:04:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2020-11-30 01:04:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-30 01:04:23,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:23,362 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:23,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:04:23,576 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:23,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1502460051, now seen corresponding path program 1 times [2020-11-30 01:04:23,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:23,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085706248] [2020-11-30 01:04:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:23,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:23,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:23,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:04:23,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085706248] [2020-11-30 01:04:23,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691489256] [2020-11-30 01:04:23,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:23,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 01:04:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:04:23,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:23,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-30 01:04:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130393256] [2020-11-30 01:04:23,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:04:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:23,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:04:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:04:23,895 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 9 states. [2020-11-30 01:04:24,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:24,192 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2020-11-30 01:04:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:04:24,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-11-30 01:04:24,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:24,201 INFO L225 Difference]: With dead ends: 51 [2020-11-30 01:04:24,201 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 01:04:24,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:04:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 01:04:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-30 01:04:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-30 01:04:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-11-30 01:04:24,229 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2020-11-30 01:04:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:24,230 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-11-30 01:04:24,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:04:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-11-30 01:04:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 01:04:24,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:24,237 INFO L422 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, 1] [2020-11-30 01:04:24,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:24,437 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash -801267146, now seen corresponding path program 1 times [2020-11-30 01:04:24,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:24,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48473661] [2020-11-30 01:04:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-30 01:04:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-30 01:04:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 01:04:24,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48473661] [2020-11-30 01:04:24,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399655996] [2020-11-30 01:04:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:24,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:04:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 01:04:24,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:24,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-11-30 01:04:24,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068668738] [2020-11-30 01:04:24,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:04:24,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:04:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-11-30 01:04:24,807 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 11 states. [2020-11-30 01:04:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:25,241 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2020-11-30 01:04:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:04:25,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-11-30 01:04:25,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:25,245 INFO L225 Difference]: With dead ends: 105 [2020-11-30 01:04:25,245 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 01:04:25,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:04:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 01:04:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-30 01:04:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-30 01:04:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2020-11-30 01:04:25,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2020-11-30 01:04:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:25,269 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2020-11-30 01:04:25,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:04:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2020-11-30 01:04:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-30 01:04:25,272 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:25,272 INFO L422 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, 1, 1] [2020-11-30 01:04:25,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:25,494 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:25,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:25,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1583643682, now seen corresponding path program 1 times [2020-11-30 01:04:25,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:25,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122055837] [2020-11-30 01:04:25,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-30 01:04:25,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122055837] [2020-11-30 01:04:25,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473390220] [2020-11-30 01:04:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:25,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:04:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 01:04:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-11-30 01:04:25,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972251997] [2020-11-30 01:04:25,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:04:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:04:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:04:25,925 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand 13 states. [2020-11-30 01:04:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:26,538 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2020-11-30 01:04:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:04:26,539 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-11-30 01:04:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:26,542 INFO L225 Difference]: With dead ends: 177 [2020-11-30 01:04:26,542 INFO L226 Difference]: Without dead ends: 117 [2020-11-30 01:04:26,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-11-30 01:04:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-11-30 01:04:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2020-11-30 01:04:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-30 01:04:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2020-11-30 01:04:26,573 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2020-11-30 01:04:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:26,573 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2020-11-30 01:04:26,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:04:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2020-11-30 01:04:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-30 01:04:26,577 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:26,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1] [2020-11-30 01:04:26,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:26,803 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1063158393, now seen corresponding path program 1 times [2020-11-30 01:04:26,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:26,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697518527] [2020-11-30 01:04:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:26,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:26,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-30 01:04:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-30 01:04:27,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697518527] [2020-11-30 01:04:27,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375395400] [2020-11-30 01:04:27,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:04:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:27,258 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 01:04:27,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:27,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-11-30 01:04:27,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065118299] [2020-11-30 01:04:27,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:04:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:04:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:04:27,260 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand 14 states. [2020-11-30 01:04:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:27,998 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2020-11-30 01:04:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 01:04:27,999 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-11-30 01:04:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:28,003 INFO L225 Difference]: With dead ends: 255 [2020-11-30 01:04:28,012 INFO L226 Difference]: Without dead ends: 155 [2020-11-30 01:04:28,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-11-30 01:04:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-30 01:04:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2020-11-30 01:04:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-30 01:04:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2020-11-30 01:04:28,047 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2020-11-30 01:04:28,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:28,048 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2020-11-30 01:04:28,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:04:28,049 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2020-11-30 01:04:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-11-30 01:04:28,055 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:28,055 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:28,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 01:04:28,257 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1732889556, now seen corresponding path program 1 times [2020-11-30 01:04:28,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:28,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431985487] [2020-11-30 01:04:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-30 01:04:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-11-30 01:04:28,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431985487] [2020-11-30 01:04:28,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362816957] [2020-11-30 01:04:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:04:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-11-30 01:04:28,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:28,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-11-30 01:04:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571921183] [2020-11-30 01:04:28,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 01:04:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 01:04:28,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:04:28,880 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand 16 states. [2020-11-30 01:04:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:29,813 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2020-11-30 01:04:29,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-30 01:04:29,814 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2020-11-30 01:04:29,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:29,816 INFO L225 Difference]: With dead ends: 240 [2020-11-30 01:04:29,816 INFO L226 Difference]: Without dead ends: 107 [2020-11-30 01:04:29,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-11-30 01:04:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-30 01:04:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-11-30 01:04:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-30 01:04:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2020-11-30 01:04:29,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 93 [2020-11-30 01:04:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:29,848 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2020-11-30 01:04:29,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 01:04:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2020-11-30 01:04:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-11-30 01:04:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:29,851 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 9, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:30,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:30,053 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 740260986, now seen corresponding path program 2 times [2020-11-30 01:04:30,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:30,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270995731] [2020-11-30 01:04:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-30 01:04:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-30 01:04:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-30 01:04:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 67 proven. 142 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2020-11-30 01:04:30,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270995731] [2020-11-30 01:04:30,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144198302] [2020-11-30 01:04:30,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:30,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:04:30,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:04:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 01:04:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 54 proven. 127 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-11-30 01:04:30,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:30,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2020-11-30 01:04:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901225407] [2020-11-30 01:04:30,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 01:04:30,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 01:04:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-11-30 01:04:30,903 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand 15 states. [2020-11-30 01:04:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:31,458 INFO L93 Difference]: Finished difference Result 169 states and 248 transitions. [2020-11-30 01:04:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 01:04:31,459 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 148 [2020-11-30 01:04:31,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:31,461 INFO L225 Difference]: With dead ends: 169 [2020-11-30 01:04:31,461 INFO L226 Difference]: Without dead ends: 93 [2020-11-30 01:04:31,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-11-30 01:04:31,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-30 01:04:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2020-11-30 01:04:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-30 01:04:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2020-11-30 01:04:31,494 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 148 [2020-11-30 01:04:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:31,498 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2020-11-30 01:04:31,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 01:04:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2020-11-30 01:04:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-11-30 01:04:31,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:31,506 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 18, 18, 14, 12, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:31,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:31,727 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2003114199, now seen corresponding path program 1 times [2020-11-30 01:04:31,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:31,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712151541] [2020-11-30 01:04:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:31,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:31,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-30 01:04:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-11-30 01:04:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-30 01:04:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 159 proven. 563 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2020-11-30 01:04:32,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712151541] [2020-11-30 01:04:32,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831728433] [2020-11-30 01:04:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/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 [2020-11-30 01:04:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:04:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2077 backedges. 114 proven. 358 refuted. 0 times theorem prover too weak. 1605 trivial. 0 not checked. [2020-11-30 01:04:32,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:32,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2020-11-30 01:04:32,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932105231] [2020-11-30 01:04:32,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:04:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:32,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:04:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:04:32,963 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand 20 states. [2020-11-30 01:04:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:34,062 INFO L93 Difference]: Finished difference Result 241 states and 425 transitions. [2020-11-30 01:04:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-30 01:04:34,063 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 273 [2020-11-30 01:04:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:34,065 INFO L225 Difference]: With dead ends: 241 [2020-11-30 01:04:34,065 INFO L226 Difference]: Without dead ends: 124 [2020-11-30 01:04:34,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2020-11-30 01:04:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-30 01:04:34,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2020-11-30 01:04:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-30 01:04:34,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2020-11-30 01:04:34,101 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 273 [2020-11-30 01:04:34,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:34,104 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2020-11-30 01:04:34,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:04:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2020-11-30 01:04:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-11-30 01:04:34,108 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:34,108 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:34,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 01:04:34,335 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:34,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:34,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1432636663, now seen corresponding path program 3 times [2020-11-30 01:04:34,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:34,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658289643] [2020-11-30 01:04:34,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:34,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 01:04:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-11-30 01:04:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 128 proven. 118 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-11-30 01:04:34,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658289643] [2020-11-30 01:04:34,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804581966] [2020-11-30 01:04:34,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:34,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 01:04:34,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:04:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:04:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 94 proven. 24 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2020-11-30 01:04:34,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:34,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 18 [2020-11-30 01:04:34,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514678086] [2020-11-30 01:04:34,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 01:04:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:34,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 01:04:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:04:34,873 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand 18 states. [2020-11-30 01:04:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:35,592 INFO L93 Difference]: Finished difference Result 219 states and 296 transitions. [2020-11-30 01:04:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-30 01:04:35,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-11-30 01:04:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:35,597 INFO L225 Difference]: With dead ends: 219 [2020-11-30 01:04:35,597 INFO L226 Difference]: Without dead ends: 121 [2020-11-30 01:04:35,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 01:04:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-11-30 01:04:35,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2020-11-30 01:04:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-30 01:04:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-11-30 01:04:35,617 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 134 [2020-11-30 01:04:35,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:35,619 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-11-30 01:04:35,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 01:04:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-11-30 01:04:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-11-30 01:04:35,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:35,625 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:35,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:35,843 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash -315664995, now seen corresponding path program 4 times [2020-11-30 01:04:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:35,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756831264] [2020-11-30 01:04:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:35,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-30 01:04:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:35,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 01:04:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-11-30 01:04:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-30 01:04:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-30 01:04:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-30 01:04:36,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-30 01:04:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-30 01:04:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:04:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 207 proven. 371 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2020-11-30 01:04:36,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756831264] [2020-11-30 01:04:36,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172689421] [2020-11-30 01:04:36,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/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 [2020-11-30 01:04:36,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 01:04:36,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:04:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 01:04:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:04:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 275 proven. 129 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-11-30 01:04:36,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:04:36,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 20 [2020-11-30 01:04:36,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596564551] [2020-11-30 01:04:36,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 01:04:36,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:04:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 01:04:36,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:04:36,799 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 20 states. [2020-11-30 01:04:37,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:04:37,831 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2020-11-30 01:04:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-30 01:04:37,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 215 [2020-11-30 01:04:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:04:37,835 INFO L225 Difference]: With dead ends: 233 [2020-11-30 01:04:37,835 INFO L226 Difference]: Without dead ends: 140 [2020-11-30 01:04:37,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2020-11-30 01:04:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-11-30 01:04:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2020-11-30 01:04:37,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-11-30 01:04:37,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2020-11-30 01:04:37,847 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 215 [2020-11-30 01:04:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:04:37,847 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2020-11-30 01:04:37,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 01:04:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2020-11-30 01:04:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-11-30 01:04:37,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:04:37,849 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:04:38,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:04:38,051 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:04:38,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:04:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2037516304, now seen corresponding path program 5 times [2020-11-30 01:04:38,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:04:38,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842268976] [2020-11-30 01:04:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:04:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:04:38,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:04:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:04:38,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:04:38,149 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:04:38,149 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:04:38,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 01:04:38,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:04:38 BoogieIcfgContainer [2020-11-30 01:04:38,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:04:38,289 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:04:38,289 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:04:38,289 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:04:38,290 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:04:21" (3/4) ... [2020-11-30 01:04:38,292 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:04:38,428 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5a006342-8710-459f-98f4-f4387672103e/bin/uautomizer/witness.graphml [2020-11-30 01:04:38,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:04:38,430 INFO L168 Benchmark]: Toolchain (without parser) took 17565.83 ms. Allocated memory was 86.0 MB in the beginning and 285.2 MB in the end (delta: 199.2 MB). Free memory was 55.9 MB in the beginning and 141.3 MB in the end (delta: -85.4 MB). Peak memory consumption was 114.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,430 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory was 46.0 MB in the beginning and 45.9 MB in the end (delta: 75.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:04:38,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.11 ms. Allocated memory is still 86.0 MB. Free memory was 55.7 MB in the beginning and 63.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 86.0 MB. Free memory was 63.8 MB in the beginning and 62.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,432 INFO L168 Benchmark]: Boogie Preprocessor took 32.84 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 61.5 MB in the end (delta: 850.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:04:38,432 INFO L168 Benchmark]: RCFGBuilder took 594.78 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 49.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,433 INFO L168 Benchmark]: TraceAbstraction took 16436.75 ms. Allocated memory was 86.0 MB in the beginning and 285.2 MB in the end (delta: 199.2 MB). Free memory was 48.4 MB in the beginning and 149.7 MB in the end (delta: -101.3 MB). Peak memory consumption was 100.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,433 INFO L168 Benchmark]: Witness Printer took 139.49 ms. Allocated memory is still 285.2 MB. Free memory was 149.7 MB in the beginning and 141.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:04:38,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory was 46.0 MB in the beginning and 45.9 MB in the end (delta: 75.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.11 ms. Allocated memory is still 86.0 MB. Free memory was 55.7 MB in the beginning and 63.8 MB in the end (delta: -8.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.88 ms. Allocated memory is still 86.0 MB. Free memory was 63.8 MB in the beginning and 62.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.84 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 61.5 MB in the end (delta: 850.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 594.78 ms. Allocated memory is still 86.0 MB. Free memory was 61.2 MB in the beginning and 49.0 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16436.75 ms. Allocated memory was 86.0 MB in the beginning and 285.2 MB in the end (delta: 199.2 MB). Free memory was 48.4 MB in the beginning and 149.7 MB in the end (delta: -101.3 MB). Peak memory consumption was 100.6 MB. Max. memory is 16.1 GB. * Witness Printer took 139.49 ms. Allocated memory is still 285.2 MB. Free memory was 149.7 MB in the beginning and 141.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L38] int x = 6; [L39] CALL, EXPR fibo1(x) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) [L39] int result = fibo1(x); [L40] COND TRUE result == 8 [L4] __assert_fail("0", "fibo_2calls_6-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.2s, OverallIterations: 13, TraceHistogramMax: 21, AutomataDifference: 6.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 581 SDslu, 2351 SDs, 0 SdLazy, 3881 SolverSat, 618 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1565 GetRequests, 1315 SyntacticMatches, 2 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 12 MinimizatonAttempts, 155 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 2263 NumberOfCodeBlocks, 2157 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 2067 ConstructedInterpolants, 0 QuantifiedInterpolants, 507911 SizeOfPredicates, 47 NumberOfNonLiveVariables, 2303 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 7179/9224 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...